1220377608 has 108 divisors (see below), whose sum is σ = 3474551535. Its totient is φ = 386932128.

The previous prime is 1220377579. The next prime is 1220377637. The reversal of 1220377608 is 8067730221.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1220377608 is a `hidden beast` number, since 1 + 220 + 377 + 60 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1220377579) and next prime (1220377637).

It can be written as a sum of positive squares in only one way, i.e., 610188804 + 610188804 = 24702^2 + 24702^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24702.

It is a super-2 number, since 2×1220377608² = 2978643012215603328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6817663 + ... + 6817841.

Almost surely, 2^1220377608 is an apocalyptic number.

1220377608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220377608

1220377608 is an abundant number, since it is smaller than the sum of its proper divisors (2254173927).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220377608 is a wasteful number, since it uses less digits than its factorization.

1220377608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1220377608 is about 34933.9034177402. The cubic root of 1220377608 is about 1068.6399606826.

The spelling of 1220377608 in words is "one billion, two hundred twenty million, three hundred seventy-seven thousand, six hundred eight".