402043968 has 42 divisors (see below), whose sum is σ = 1152388094. Its totient is φ = 134014464.

The previous prime is 402043963. The next prime is 402043973. The reversal of 402043968 is 869340204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (402043963) and next prime (402043973).

It can be written as a sum of positive squares in only one way, i.e., 212926464 + 189117504 = 14592^2 + 13752^2 .

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

It is not an unprimeable number, because it can be changed into a prime (402043963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 348421 + ... + 349572.

Almost surely, 2^402043968 is an apocalyptic number.

402043968 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

402043968 is an abundant number, since it is smaller than the sum of its proper divisors (750344126).

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

402043968 is a wasteful number, since it uses less digits than its factorization.

402043968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698011 (or 697998 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 402043968 is about 20051.0340880464. The cubic root of 402043968 is about 738.0591751964.

The spelling of 402043968 in words is "four hundred two million, forty-three thousand, nine hundred sixty-eight".