1617222240 has 576 divisors, whose sum is σ = 6428963520. Its totient is φ = 378224640.

The previous prime is 1617222239. The next prime is 1617222241. The reversal of 1617222240 is 422227161.

1617222240 is a `hidden beast` number, since 1 + 617 + 2 + 2 + 2 + 2 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1617222239) and next prime (1617222241).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617222241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26511810 + ... + 26511870.

It is an arithmetic number, because the mean of its divisors is an integer number (11161395).

Almost surely, 2^1617222240 is an apocalyptic number.

1617222240 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 1617222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3214481760).

1617222240 is an abundant number, since it is smaller than the sum of its proper divisors (4811741280).

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

1617222240 is a wasteful number, since it uses less digits than its factorization.

1617222240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1617222240 is about 40214.7017892710. The cubic root of 1617222240 is about 1173.7886390122.

The spelling of 1617222240 in words is "one billion, six hundred seventeen million, two hundred twenty-two thousand, two hundred forty".