53749940 has 12 divisors (see below), whose sum is σ = 112874916. Its totient is φ = 21499968.

The previous prime is 53749909. The next prime is 53749979. The reversal of 53749940 is 4994735.

It can be written as a sum of positive squares in 2 ways, for example, as 37797904 + 15952036 = 6148^2 + 3994^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343729 + ... + 1343768.

It is an arithmetic number, because the mean of its divisors is an integer number (9406243).

Almost surely, 2^53749940 is an apocalyptic number.

It is an amenable number.

53749940 is an abundant number, since it is smaller than the sum of its proper divisors (59124976).

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

53749940 is a wasteful number, since it uses less digits than its factorization.

53749940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687506 (or 2687504 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 53749940 is about 7331.4350573404. The cubic root of 53749940 is about 377.3919752894.

The spelling of 53749940 in words is "fifty-three million, seven hundred forty-nine thousand, nine hundred forty".