53391990 has 32 divisors (see below), whose sum is σ = 129587040. Its totient is φ = 14077184.

The previous prime is 53391983. The next prime is 53392021. The reversal of 53391990 is 9919335.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7329 + ... + 12668.

It is an arithmetic number, because the mean of its divisors is an integer number (4049595).

Almost surely, 2^53391990 is an apocalyptic number.

53391990 is an abundant number, since it is smaller than the sum of its proper divisors (76195050).

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

53391990 is a wasteful number, since it uses less digits than its factorization.

53391990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20096.

The product of its (nonzero) digits is 32805, while the sum is 39.

The square root of 53391990 is about 7306.9822772469. The cubic root of 53391990 is about 376.5523560854.

The spelling of 53391990 in words is "fifty-three million, three hundred ninety-one thousand, nine hundred ninety".