51998744 has 32 divisors (see below), whose sum is σ = 117292800. Its totient is φ = 21111840.

The previous prime is 51998689. The next prime is 51998789. The reversal of 51998744 is 44789915.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 23372 + ... + 25499.

It is an arithmetic number, because the mean of its divisors is an integer number (3665400).

Almost surely, 2^51998744 is an apocalyptic number.

It is an amenable number.

51998744 is an abundant number, since it is smaller than the sum of its proper divisors (65294056).

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

51998744 is a wasteful number, since it uses less digits than its factorization.

51998744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48903 (or 48899 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 51998744 is about 7211.0154624713. The cubic root of 51998744 is about 373.2481105075.

The spelling of 51998744 in words is "fifty-one million, nine hundred ninety-eight thousand, seven hundred forty-four".