52890440 has 16 divisors (see below), whose sum is σ = 119003580. Its totient is φ = 21156160.

The previous prime is 52890413. The next prime is 52890443. The reversal of 52890440 is 4409825.

It can be written as a sum of positive squares in 2 ways, for example, as 50154724 + 2735716 = 7082^2 + 1654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52890397 and 52890406.

It is not an unprimeable number, because it can be changed into a prime (52890443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661091 + ... + 661170.

Almost surely, 2^52890440 is an apocalyptic number.

It is an amenable number.

52890440 is an abundant number, since it is smaller than the sum of its proper divisors (66113140).

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

52890440 is a wasteful number, since it uses less digits than its factorization.

52890440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322272 (or 1322268 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 52890440 is about 7272.5813849004. The cubic root of 52890440 is about 375.3695675185.

The spelling of 52890440 in words is "fifty-two million, eight hundred ninety thousand, four hundred forty".