53781904 has 40 divisors (see below), whose sum is σ = 114099840. Its totient is φ = 24355200.

The previous prime is 53781901. The next prime is 53781911. The reversal of 53781904 is 40918735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781901) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 75502 + ... + 76210.

It is an arithmetic number, because the mean of its divisors is an integer number (2852496).

Almost surely, 2^53781904 is an apocalyptic number.

It is an amenable number.

53781904 is an abundant number, since it is smaller than the sum of its proper divisors (60317936).

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

53781904 is a wasteful number, since it uses less digits than its factorization.

53781904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 53781904 is about 7333.6146612704. The cubic root of 53781904 is about 377.4667695849.

The spelling of 53781904 in words is "fifty-three million, seven hundred eighty-one thousand, nine hundred four".