401645970 has 48 divisors (see below), whose sum is σ = 1139216832. Its totient is φ = 97368480.

The previous prime is 401645939. The next prime is 401645971. The reversal of 401645970 is 79546104.

401645970 is a `hidden beast` number, since 4 + 0 + 1 + 64 + 597 + 0 = 666.

It is a super-2 number, since 2×401645970² = 322638970434481800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401645971) 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, 201862 + ... + 203841.

It is an arithmetic number, because the mean of its divisors is an integer number (23733684).

Almost surely, 2^401645970 is an apocalyptic number.

401645970 is an abundant number, since it is smaller than the sum of its proper divisors (737570862).

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

401645970 is a wasteful number, since it uses less digits than its factorization.

401645970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405727 (or 405724 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 401645970 is about 20041.1070053528. The cubic root of 401645970 is about 737.8155508814.

The spelling of 401645970 in words is "four hundred one million, six hundred forty-five thousand, nine hundred seventy".