400336992 has 240 divisors, whose sum is σ = 1353844800. Its totient is φ = 114773760.

The previous prime is 400336943. The next prime is 400337059. The reversal of 400336992 is 299633004.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 541359 + ... + 542097.

It is an arithmetic number, because the mean of its divisors is an integer number (5641020).

Almost surely, 2^400336992 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 400336992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676922400).

400336992 is an abundant number, since it is smaller than the sum of its proper divisors (953507808).

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

400336992 is a wasteful number, since it uses less digits than its factorization.

400336992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 400336992 is about 20008.4230263157. The cubic root of 400336992 is about 737.0131565052.

Adding to 400336992 its reverse (299633004), we get a palindrome (699969996).

The spelling of 400336992 in words is "four hundred million, three hundred thirty-six thousand, nine hundred ninety-two".