47917980 has 120 divisors (see below), whose sum is σ = 164046960. Its totient is φ = 11612160.

The previous prime is 47917979. The next prime is 47917999. The reversal of 47917980 is 8971974.

47917980 is a `hidden beast` number, since 479 + 179 + 8 + 0 = 666.

It is a super-2 number, since 2×47917980² = 4592265614560800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16476 + ... + 19164.

It is an arithmetic number, because the mean of its divisors is an integer number (1367058).

Almost surely, 2^47917980 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 47917980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82023480).

47917980 is an abundant number, since it is smaller than the sum of its proper divisors (116128980).

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

47917980 is a wasteful number, since it uses less digits than its factorization.

47917980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 47917980 is about 6922.2814158339. The cubic root of 47917980 is about 363.2170002296.

The spelling of 47917980 in words is "forty-seven million, nine hundred seventeen thousand, nine hundred eighty".