51440748 has 48 divisors (see below), whose sum is σ = 123432960. Its totient is φ = 16665984.

The previous prime is 51440737. The next prime is 51440777. The reversal of 51440748 is 84704415.

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, 125568 + ... + 125976.

It is an arithmetic number, because the mean of its divisors is an integer number (2571520).

Almost surely, 2^51440748 is an apocalyptic number.

It is an amenable number.

51440748 is an abundant number, since it is smaller than the sum of its proper divisors (71992212).

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

51440748 is a wasteful number, since it uses less digits than its factorization.

51440748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 51440748 is about 7172.2205766415. The cubic root of 51440748 is about 371.9082037344.

It can be divided in two parts, 5 and 1440748, that added together give a triangular number (1440753 = T₁₆₉₇).

The spelling of 51440748 in words is "fifty-one million, four hundred forty thousand, seven hundred forty-eight".