402313440 has 48 divisors (see below), whose sum is σ = 1267288848. Its totient is φ = 107283456.

The previous prime is 402313409. The next prime is 402313451. The reversal of 402313440 is 44313204.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×402313440² = 323712208009267200, which contains 22 as substring.

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, 418597 + ... + 419556.

It is an arithmetic number, because the mean of its divisors is an integer number (26401851).

Almost surely, 2^402313440 is an apocalyptic number.

402313440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402313440 is an abundant number, since it is smaller than the sum of its proper divisors (864975408).

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

402313440 is a wasteful number, since it uses less digits than its factorization.

402313440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838171 (or 838163 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402313440 is about 20057.7526158840. The cubic root of 402313440 is about 738.2240343325.

Adding to 402313440 its reverse (44313204), we get a palindrome (446626644).

It can be divided in two parts, 402313 and 440, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 402313440 in words is "four hundred two million, three hundred thirteen thousand, four hundred forty".