52147980 has 72 divisors (see below), whose sum is σ = 158899104. Its totient is φ = 13843200.

The previous prime is 52147967. The next prime is 52147999. The reversal of 52147980 is 8974125.

52147980 is a `hidden beast` number, since 521 + 47 + 98 + 0 = 666.

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 23 ways as a sum of consecutive naturals, for example, 50065 + ... + 51095.

It is an arithmetic number, because the mean of its divisors is an integer number (2206932).

Almost surely, 2^52147980 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 52147980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79449552).

52147980 is an abundant number, since it is smaller than the sum of its proper divisors (106751124).

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

52147980 is a wasteful number, since it uses less digits than its factorization.

52147980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 52147980 is about 7221.3558283746. The cubic root of 52147980 is about 373.6048425321.

The spelling of 52147980 in words is "fifty-two million, one hundred forty-seven thousand, nine hundred eighty".