401645592 has 96 divisors (see below), whose sum is σ = 1133730000. Its totient is φ = 128298240.

The previous prime is 401645581. The next prime is 401645593. The reversal of 401645592 is 295546104.

401645592 is a `hidden beast` number, since 4 + 0 + 1 + 64 + 5 + 592 = 666.

It is a super-2 number, since 2×401645592² = 322638363146060928, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401645593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 310467 + ... + 311757.

Almost surely, 2^401645592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401645592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566865000).

401645592 is an abundant number, since it is smaller than the sum of its proper divisors (732084408).

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

401645592 is a wasteful number, since it uses less digits than its factorization.

401645592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 401645592 is about 20041.0975747338. The cubic root of 401645592 is about 737.8153194219.

The spelling of 401645592 in words is "four hundred one million, six hundred forty-five thousand, five hundred ninety-two".