51924840 has 128 divisors (see below), whose sum is σ = 171763200. Its totient is φ = 12453120.

The previous prime is 51924833. The next prime is 51924889. The reversal of 51924840 is 4842915.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183339 + ... + 183621.

It is an arithmetic number, because the mean of its divisors is an integer number (1341900).

Almost surely, 2^51924840 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 51924840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85881600).

51924840 is an abundant number, since it is smaller than the sum of its proper divisors (119838360).

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

51924840 is a wasteful number, since it uses less digits than its factorization.

51924840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 51924840 is about 7205.8892580999. The cubic root of 51924840 is about 373.0711984973.

The spelling of 51924840 in words is "fifty-one million, nine hundred twenty-four thousand, eight hundred forty".