402407388 has 36 divisors (see below), whose sum is σ = 1017817528. Its totient is φ = 134053920.

The previous prime is 402407387. The next prime is 402407389. The reversal of 402407388 is 883704204.

It is an interprime number because it is at equal distance from previous prime (402407387) and next prime (402407389).

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402407381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96270 + ... + 100362.

Almost surely, 2^402407388 is an apocalyptic number.

It is an amenable number.

402407388 is an abundant number, since it is smaller than the sum of its proper divisors (615410140).

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

402407388 is a wasteful number, since it uses less digits than its factorization.

402407388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834 (or 6829 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 402407388 is about 20060.0944165276. The cubic root of 402407388 is about 738.2814930756.

The spelling of 402407388 in words is "four hundred two million, four hundred seven thousand, three hundred eighty-eight".