401397942 has 16 divisors (see below), whose sum is σ = 875777472. Its totient is φ = 121635720.

The previous prime is 401397929. The next prime is 401397943. The reversal of 401397942 is 249793104.

It is a super-2 number, since 2×401397942² = 322240615683670728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401397942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401397943) 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, 3040828 + ... + 3040959.

It is an arithmetic number, because the mean of its divisors is an integer number (54736092).

Almost surely, 2^401397942 is an apocalyptic number.

401397942 is an abundant number, since it is smaller than the sum of its proper divisors (474379530).

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

401397942 is a wasteful number, since it uses less digits than its factorization.

401397942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6081803.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 401397942 is about 20034.9180682128. The cubic root of 401397942 is about 737.6636454629.

The spelling of 401397942 in words is "four hundred one million, three hundred ninety-seven thousand, nine hundred forty-two".