1220449680 has 200 divisors, whose sum is σ = 4275059712. Its totient is φ = 322672896.

The previous prime is 1220449651. The next prime is 1220449723. The reversal of 1220449680 is 869440221.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 39 ways as a sum of consecutive naturals, for example, 822219 + ... + 823701.

Almost surely, 2^1220449680 is an apocalyptic number.

1220449680 is a gapful number since it is divisible by the number (10) 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 1220449680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2137529856).

1220449680 is an abundant number, since it is smaller than the sum of its proper divisors (3054610032).

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

1220449680 is a wasteful number, since it uses less digits than its factorization.

1220449680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1220449680 is about 34934.9349505620. The cubic root of 1220449680 is about 1068.6609972051.

The spelling of 1220449680 in words is "one billion, two hundred twenty million, four hundred forty-nine thousand, six hundred eighty".