52640340 has 48 divisors (see below), whose sum is σ = 147916608. Its totient is φ = 13987584.

The previous prime is 52640327. The next prime is 52640363. The reversal of 52640340 is 4304625.

It is a self number, because there is not a number n which added to its sum of digits gives 52640340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17379 + ... + 20181.

It is an arithmetic number, because the mean of its divisors is an integer number (3081596).

Almost surely, 2^52640340 is an apocalyptic number.

It is an amenable number.

52640340 is an abundant number, since it is smaller than the sum of its proper divisors (95276268).

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

52640340 is a wasteful number, since it uses less digits than its factorization.

52640340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128 (or 3126 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 52640340 is about 7255.3662898575. The cubic root of 52640340 is about 374.7769696017.

Adding to 52640340 its reverse (4304625), we get a palindrome (56944965).

The spelling of 52640340 in words is "fifty-two million, six hundred forty thousand, three hundred forty".