53889840 has 160 divisors (see below), whose sum is σ = 189124800. Its totient is φ = 14100480.

The previous prime is 53889839. The next prime is 53889853. The reversal of 53889840 is 4898835.

It is a super-2 number, since 2×53889840² = 5808229710451200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 131556 + ... + 131964.

It is an arithmetic number, because the mean of its divisors is an integer number (1182030).

Almost surely, 2^53889840 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 53889840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94562400).

53889840 is an abundant number, since it is smaller than the sum of its proper divisors (135234960).

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

53889840 is a wasteful number, since it uses less digits than its factorization.

53889840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 53889840 is about 7340.9699631588. The cubic root of 53889840 is about 377.7191160997.

The spelling of 53889840 in words is "fifty-three million, eight hundred eighty-nine thousand, eight hundred forty".