53881840 has 40 divisors (see below), whose sum is σ = 132647760. Its totient is φ = 20284416.

The previous prime is 53881781. The next prime is 53881843. The reversal of 53881840 is 4818835.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 53881840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53881843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18450 + ... + 21169.

It is an arithmetic number, because the mean of its divisors is an integer number (3316194).

Almost surely, 2^53881840 is an apocalyptic number.

It is an amenable number.

53881840 is an abundant number, since it is smaller than the sum of its proper divisors (78765920).

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

53881840 is a wasteful number, since it uses less digits than its factorization.

53881840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39649 (or 39643 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 53881840 is about 7340.4250558125. The cubic root of 53881840 is about 377.7004242494.

The spelling of 53881840 in words is "fifty-three million, eight hundred eighty-one thousand, eight hundred forty".