402031564 has 48 divisors (see below), whose sum is σ = 810875520. Its totient is φ = 172488960.

The previous prime is 402031547. The next prime is 402031571. The reversal of 402031564 is 465130204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281019 + ... + 282445.

It is an arithmetic number, because the mean of its divisors is an integer number (16893240).

Almost surely, 2^402031564 is an apocalyptic number.

402031564 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402031564 is an abundant number, since it is smaller than the sum of its proper divisors (408843956).

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

402031564 is a wasteful number, since it uses less digits than its factorization.

402031564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 402031564 is about 20050.7247749302. The cubic root of 402031564 is about 738.0515848324.

Adding to 402031564 its reverse (465130204), we get a palindrome (867161768).

The spelling of 402031564 in words is "four hundred two million, thirty-one thousand, five hundred sixty-four".