53891990 has 32 divisors (see below), whose sum is σ = 103156416. Its totient is φ = 20225920.

The previous prime is 53891963. The next prime is 53891993. The reversal of 53891990 is 9919835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53891993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9980 + ... + 14400.

It is an arithmetic number, because the mean of its divisors is an integer number (3223638).

Almost surely, 2^53891990 is an apocalyptic number.

53891990 is a deficient number, since it is larger than the sum of its proper divisors (49264426).

53891990 is a wasteful number, since it uses less digits than its factorization.

53891990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 53891990 is about 7341.1164001125. The cubic root of 53891990 is about 377.7241392191.

The spelling of 53891990 in words is "fifty-three million, eight hundred ninety-one thousand, nine hundred ninety".