52890640 has 40 divisors (see below), whose sum is σ = 134152128. Its totient is φ = 19232640.

The previous prime is 52890637. The next prime is 52890647. The reversal of 52890640 is 4609825.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 52890596 and 52890605.

It is not an unprimeable number, because it can be changed into a prime (52890647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29172 + ... + 30931.

Almost surely, 2^52890640 is an apocalyptic number.

It is an amenable number.

52890640 is an abundant number, since it is smaller than the sum of its proper divisors (81261488).

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

52890640 is a wasteful number, since it uses less digits than its factorization.

52890640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60127 (or 60121 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 52890640 is about 7272.5951351632. The cubic root of 52890640 is about 375.3700406589.

The spelling of 52890640 in words is "fifty-two million, eight hundred ninety thousand, six hundred forty".