402231520 has 48 divisors (see below), whose sum is σ = 1000293840. Its totient is φ = 152423424.

The previous prime is 402231517. The next prime is 402231547. The reversal of 402231520 is 25132204.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63117 + ... + 69196.

It is an arithmetic number, because the mean of its divisors is an integer number (20839455).

Almost surely, 2^402231520 is an apocalyptic number.

402231520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402231520 is an abundant number, since it is smaller than the sum of its proper divisors (598062320).

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

402231520 is a wasteful number, since it uses less digits than its factorization.

402231520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132347 (or 132339 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 402231520 is about 20055.7104087589. The cubic root of 402231520 is about 738.1739246319.

Adding to 402231520 its reverse (25132204), we get a palindrome (427363724).

The spelling of 402231520 in words is "four hundred two million, two hundred thirty-one thousand, five hundred twenty".