401685040 has 40 divisors (see below), whose sum is σ = 936658800. Its totient is φ = 160202496.

The previous prime is 401685029. The next prime is 401685047. The reversal of 401685040 is 40586104.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×401685040² = 322701742719603200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401685047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20727 + ... + 35113.

It is an arithmetic number, because the mean of its divisors is an integer number (23416470).

Almost surely, 2^401685040 is an apocalyptic number.

401685040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401685040 is an abundant number, since it is smaller than the sum of its proper divisors (534973760).

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

401685040 is a wasteful number, since it uses less digits than its factorization.

401685040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749 (or 14743 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 401685040 is about 20042.0817282038. The cubic root of 401685040 is about 737.8394737065.

The spelling of 401685040 in words is "four hundred one million, six hundred eighty-five thousand, forty".