52320402 has 24 divisors (see below), whose sum is σ = 113506380. Its totient is φ = 17417760.

The previous prime is 52320391. The next prime is 52320409. The reversal of 52320402 is 20402325.

It can be written as a sum of positive squares in 2 ways, for example, as 51108201 + 1212201 = 7149^2 + 1101^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (52320409) 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, 18652 + ... + 21272.

Almost surely, 2^52320402 is an apocalyptic number.

52320402 is an abundant number, since it is smaller than the sum of its proper divisors (61185978).

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

52320402 is a wasteful number, since it uses less digits than its factorization.

52320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738 (or 3735 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 52320402 is about 7233.2843162702. The cubic root of 52320402 is about 374.0161517041.

Adding to 52320402 its reverse (20402325), we get a palindrome (72722727).

The spelling of 52320402 in words is "fifty-two million, three hundred twenty thousand, four hundred two".