53869780 has 24 divisors (see below), whose sum is σ = 116185608. Its totient is φ = 20965248.

The previous prime is 53869757. The next prime is 53869793. The reversal of 53869780 is 8796835.

It can be written as a sum of positive squares in 4 ways, for example, as 17073424 + 36796356 = 4132^2 + 6066^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 53869780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35659 + ... + 37138.

It is an arithmetic number, because the mean of its divisors is an integer number (4841067).

Almost surely, 2^53869780 is an apocalyptic number.

It is an amenable number.

53869780 is an abundant number, since it is smaller than the sum of its proper divisors (62315828).

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

53869780 is a wasteful number, since it uses less digits than its factorization.

53869780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72843 (or 72841 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 53869780 is about 7339.6035315268. The cubic root of 53869780 is about 377.6722427878.

The spelling of 53869780 in words is "fifty-three million, eight hundred sixty-nine thousand, seven hundred eighty".