3997622160 has 480 divisors, whose sum is σ = 16476445440. Its totient is φ = 881362944.

The previous prime is 3997622159. The next prime is 3997622183. The reversal of 3997622160 is 612267993.

It is a happy number.

3997622160 is a `hidden beast` number, since 3 + 9 + 9 + 7 + 622 + 16 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3945814 + ... + 3946826.

It is an arithmetic number, because the mean of its divisors is an integer number (34325928).

Almost surely, 2^3997622160 is an apocalyptic number.

3997622160 is a gapful number since it is divisible by the number (30) 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 3997622160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8238222720).

3997622160 is an abundant number, since it is smaller than the sum of its proper divisors (12478823280).

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

3997622160 is a wasteful number, since it uses less digits than its factorization.

3997622160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 3997622160 is about 63226.7519330228. The cubic root of 3997622160 is about 1587.0864408089.

The spelling of 3997622160 in words is "three billion, nine hundred ninety-seven million, six hundred twenty-two thousand, one hundred sixty".