402115520 has 28 divisors (see below), whose sum is σ = 957538344. Its totient is φ = 160846080.

The previous prime is 402115513. The next prime is 402115543. The reversal of 402115520 is 25511204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402115492 and 402115501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627986 + ... + 628625.

It is an arithmetic number, because the mean of its divisors is an integer number (34197798).

Almost surely, 2^402115520 is an apocalyptic number.

402115520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402115520 is an abundant number, since it is smaller than the sum of its proper divisors (555422824).

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

402115520 is a wasteful number, since it uses less digits than its factorization.

402115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256628 (or 1256618 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 402115520 is about 20052.8182557964. The cubic root of 402115520 is about 738.1029568735.

Adding to 402115520 its reverse (25511204), we get a palindrome (427626724).

The spelling of 402115520 in words is "four hundred two million, one hundred fifteen thousand, five hundred twenty".