53709990 has 32 divisors (see below), whose sum is σ = 129288960. Its totient is φ = 14279904.

The previous prime is 53709961. The next prime is 53710003. The reversal of 53709990 is 9990735.

It is a happy number.

53709990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8277 + ... + 13263.

It is an arithmetic number, because the mean of its divisors is an integer number (4040280).

Almost surely, 2^53709990 is an apocalyptic number.

53709990 is an abundant number, since it is smaller than the sum of its proper divisors (75578970).

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

53709990 is a wasteful number, since it uses less digits than its factorization.

53709990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 53709990 is about 7328.7099819818. The cubic root of 53709990 is about 377.2984524174.

The spelling of 53709990 in words is "fifty-three million, seven hundred nine thousand, nine hundred ninety".