53783820 has 36 divisors (see below), whose sum is σ = 163144800. Its totient is φ = 14342304.

The previous prime is 53783803. The next prime is 53783831. The reversal of 53783820 is 2838735.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149220 + ... + 149579.

It is an arithmetic number, because the mean of its divisors is an integer number (4531800).

Almost surely, 2^53783820 is an apocalyptic number.

It is an amenable number.

53783820 is an abundant number, since it is smaller than the sum of its proper divisors (109360980).

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

53783820 is a wasteful number, since it uses less digits than its factorization.

53783820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298814 (or 298809 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 53783820 is about 7333.7452914592. The cubic root of 53783820 is about 377.4712519955.

The spelling of 53783820 in words is "fifty-three million, seven hundred eighty-three thousand, eight hundred twenty".