53566380 has 192 divisors, whose sum is σ = 196116480. Its totient is φ = 11881728.

The previous prime is 53566367. The next prime is 53566391. The reversal of 53566380 is 8366535.

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 63 ways as a sum of consecutive naturals, for example, 139669 + ... + 140051.

It is an arithmetic number, because the mean of its divisors is an integer number (1021440).

Almost surely, 2^53566380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53566380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98058240).

53566380 is an abundant number, since it is smaller than the sum of its proper divisors (142550100).

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

53566380 is a wasteful number, since it uses less digits than its factorization.

53566380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 53566380 is about 7318.9056559024. The cubic root of 53566380 is about 376.9618781914.

The spelling of 53566380 in words is "fifty-three million, five hundred sixty-six thousand, three hundred eighty".