51842940 has 24 divisors (see below), whose sum is σ = 145160400. Its totient is φ = 13824768.

The previous prime is 51842899. The next prime is 51842953. The reversal of 51842940 is 4924815.

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, 431965 + ... + 432084.

It is an arithmetic number, because the mean of its divisors is an integer number (6048350).

Almost surely, 2^51842940 is an apocalyptic number.

It is an amenable number.

51842940 is an abundant number, since it is smaller than the sum of its proper divisors (93317460).

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

51842940 is a wasteful number, since it uses less digits than its factorization.

51842940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864061 (or 864059 counting only the distinct ones).

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

The square root of 51842940 is about 7200.2041637720. The cubic root of 51842940 is about 372.8749493957.

The spelling of 51842940 in words is "fifty-one million, eight hundred forty-two thousand, nine hundred forty".