51800740 has 24 divisors (see below), whose sum is σ = 111723192. Its totient is φ = 20160000.

The previous prime is 51800731. The next prime is 51800789. The reversal of 51800740 is 4700815.

It can be written as a sum of positive squares in 4 ways, for example, as 24364096 + 27436644 = 4936^2 + 5238^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34261 + ... + 35740.

It is an arithmetic number, because the mean of its divisors is an integer number (4655133).

Almost surely, 2^51800740 is an apocalyptic number.

It is an amenable number.

51800740 is an abundant number, since it is smaller than the sum of its proper divisors (59922452).

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

51800740 is a wasteful number, since it uses less digits than its factorization.

51800740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70047 (or 70045 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 51800740 is about 7197.2730947214. The cubic root of 51800740 is about 372.7737488960.

The spelling of 51800740 in words is "fifty-one million, eight hundred thousand, seven hundred forty".