402407887 has 4 divisors (see below), whose sum is σ = 459894736. Its totient is φ = 344921040.

The previous prime is 402407879. The next prime is 402407899. The reversal of 402407887 is 788704204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402407887 - 2³ = 402407879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402407827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28743414 + ... + 28743427.

It is an arithmetic number, because the mean of its divisors is an integer number (114973684).

Almost surely, 2^402407887 is an apocalyptic number.

402407887 is a deficient number, since it is larger than the sum of its proper divisors (57486849).

402407887 is an equidigital number, since it uses as much as digits as its factorization.

402407887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57486848.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 402407887 is about 20060.1068541521. The cubic root of 402407887 is about 738.2817982409.

The spelling of 402407887 in words is "four hundred two million, four hundred seven thousand, eight hundred eighty-seven".