53855990 has 16 divisors (see below), whose sum is σ = 100068480. Its totient is φ = 20847360.

The previous prime is 53855981. The next prime is 53855993. The reversal of 53855990 is 9955835.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53855993) 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, 86555 + ... + 87174.

It is an arithmetic number, because the mean of its divisors is an integer number (6254280).

Almost surely, 2^53855990 is an apocalyptic number.

53855990 is a deficient number, since it is larger than the sum of its proper divisors (46212490).

53855990 is a wasteful number, since it uses less digits than its factorization.

53855990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173767.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 53855990 is about 7338.6640473590. The cubic root of 53855990 is about 377.6400135572.

It can be divided in two parts, 53855 and 990, that added together give a palindrome (54845).

The spelling of 53855990 in words is "fifty-three million, eight hundred fifty-five thousand, nine hundred ninety".