400232920 has 16 divisors (see below), whose sum is σ = 900524160. Its totient is φ = 160093152.

The previous prime is 400232879. The next prime is 400232927. The reversal of 400232920 is 29232004.

It is a junction number, because it is equal to n+sod(n) for n = 400232891 and 400232900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400232927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5002872 + ... + 5002951.

It is an arithmetic number, because the mean of its divisors is an integer number (56282760).

Almost surely, 2^400232920 is an apocalyptic number.

400232920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400232920 is an abundant number, since it is smaller than the sum of its proper divisors (500291240).

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

400232920 is a wasteful number, since it uses less digits than its factorization.

400232920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005834 (or 10005830 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 400232920 is about 20005.8221525635. The cubic root of 400232920 is about 736.9492860808.

Adding to 400232920 its reverse (29232004), we get a palindrome (429464924).

The spelling of 400232920 in words is "four hundred million, two hundred thirty-two thousand, nine hundred twenty".