47161980 has 48 divisors (see below), whose sum is σ = 146727840. Its totient is φ = 12576384.

The previous prime is 47161951. The next prime is 47161993. The reversal of 47161980 is 8916174.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43129 + ... + 44208.

It is an arithmetic number, because the mean of its divisors is an integer number (3056830).

Almost surely, 2^47161980 is an apocalyptic number.

It is an amenable number.

47161980 is an abundant number, since it is smaller than the sum of its proper divisors (99565860).

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

47161980 is a wasteful number, since it uses less digits than its factorization.

47161980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87355 (or 87347 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 47161980 is about 6867.4580450120. The cubic root of 47161980 is about 361.2967125492.

The spelling of 47161980 in words is "forty-seven million, one hundred sixty-one thousand, nine hundred eighty".