401894972 has 24 divisors (see below), whose sum is σ = 720298656. Its totient is φ = 196134848.

The previous prime is 401894971. The next prime is 401894981. The reversal of 401894972 is 279498104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401894971) 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, 36953 + ... + 46575.

It is an arithmetic number, because the mean of its divisors is an integer number (30012444).

Almost surely, 2^401894972 is an apocalyptic number.

It is an amenable number.

401894972 is a deficient number, since it is larger than the sum of its proper divisors (318403684).

401894972 is a wasteful number, since it uses less digits than its factorization.

401894972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9877 (or 9875 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 401894972 is about 20047.3183244044. The cubic root of 401894972 is about 737.9679899356.

The spelling of 401894972 in words is "four hundred one million, eight hundred ninety-four thousand, nine hundred seventy-two".