51652640 has 96 divisors (see below), whose sum is σ = 138438720. Its totient is φ = 18054144.

The previous prime is 51652637. The next prime is 51652651. The reversal of 51652640 is 4625615.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38867 + ... + 40173.

It is an arithmetic number, because the mean of its divisors is an integer number (1442070).

Almost surely, 2^51652640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51652640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69219360).

51652640 is an abundant number, since it is smaller than the sum of its proper divisors (86786080).

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

51652640 is a wasteful number, since it uses less digits than its factorization.

51652640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 51652640 is about 7186.9771114148. The cubic root of 51652640 is about 372.4181523700.

The spelling of 51652640 in words is "fifty-one million, six hundred fifty-two thousand, six hundred forty".