52739240 has 32 divisors (see below), whose sum is σ = 120907080. Its totient is φ = 20696832.

The previous prime is 52739233. The next prime is 52739249. The reversal of 52739240 is 4293725.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29833444 + 22905796 = 5462^2 + 4786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52739197 and 52739206.

It is not an unprimeable number, because it can be changed into a prime (52739249) 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, 10319 + ... + 14558.

Almost surely, 2^52739240 is an apocalyptic number.

It is an amenable number.

52739240 is an abundant number, since it is smaller than the sum of its proper divisors (68167840).

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

52739240 is a wasteful number, since it uses less digits than its factorization.

52739240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24941 (or 24937 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 52739240 is about 7262.1787364399. The cubic root of 52739240 is about 375.0115314972.

The spelling of 52739240 in words is "fifty-two million, seven hundred thirty-nine thousand, two hundred forty".