52000040 has 32 divisors (see below), whose sum is σ = 118752480. Its totient is φ = 20488512.

The previous prime is 52000031. The next prime is 52000043. The reversal of 52000040 is 4000025.

It is a junction number, because it is equal to n+sod(n) for n = 51999985 and 52000030.

It is not an unprimeable number, because it can be changed into a prime (52000043) 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, 7022 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (3711015).

Almost surely, 2^52000040 is an apocalyptic number.

It is an amenable number.

52000040 is an abundant number, since it is smaller than the sum of its proper divisors (66752440).

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

52000040 is a wasteful number, since it uses less digits than its factorization.

52000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19481 (or 19477 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 52000040 is about 7211.1053244284. The cubic root of 52000040 is about 373.2512113871.

Adding to 52000040 its reverse (4000025), we get a palindrome (56000065).

The spelling of 52000040 in words is "fifty-two million, forty", and thus it is an aban number, an eban number, and an uban number.