402344520 has 64 divisors (see below), whose sum is σ = 1259521920. Its totient is φ = 102626304.

The previous prime is 402344489. The next prime is 402344533. The reversal of 402344520 is 25443204.

It is a super-2 number, since 2×402344520² = 323762225548060800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70129 + ... + 75648.

It is an arithmetic number, because the mean of its divisors is an integer number (19680030).

Almost surely, 2^402344520 is an apocalyptic number.

402344520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402344520 is an abundant number, since it is smaller than the sum of its proper divisors (857177400).

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

402344520 is a wasteful number, since it uses less digits than its factorization.

402344520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145814 (or 145810 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 402344520 is about 20058.5273636925. The cubic root of 402344520 is about 738.2430438990.

Adding to 402344520 its reverse (25443204), we get a palindrome (427787724).

The spelling of 402344520 in words is "four hundred two million, three hundred forty-four thousand, five hundred twenty".