53820990 has 32 divisors (see below), whose sum is σ = 143523360. Its totient is φ = 14352192.

The previous prime is 53820979. The next prime is 53821003. The reversal of 53820990 is 9902835.

It is a Curzon number.

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, 99399 + ... + 99938.

It is an arithmetic number, because the mean of its divisors is an integer number (4485105).

Almost surely, 2^53820990 is an apocalyptic number.

53820990 is an abundant number, since it is smaller than the sum of its proper divisors (89702370).

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

53820990 is a wasteful number, since it uses less digits than its factorization.

53820990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199353 (or 199347 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 53820990 is about 7336.2790295899. The cubic root of 53820990 is about 377.5581887700.

It can be divided in two parts, 538 and 20990, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 53820990 in words is "fifty-three million, eight hundred twenty thousand, nine hundred ninety".