47391880 has 16 divisors (see below), whose sum is σ = 106631820. Its totient is φ = 18956736.

The previous prime is 47391853. The next prime is 47391881. The reversal of 47391880 is 8819374.

It can be written as a sum of positive squares in 2 ways, for example, as 39917124 + 7474756 = 6318^2 + 2734^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1184797 = 47391880 / (4 + 7 + 3 + 9 + 1 + 8 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (47391881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592359 + ... + 592438.

Almost surely, 2^47391880 is an apocalyptic number.

47391880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47391880 is an abundant number, since it is smaller than the sum of its proper divisors (59239940).

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

47391880 is a wasteful number, since it uses less digits than its factorization.

47391880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184808 (or 1184804 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47391880 is about 6884.1760581786. The cubic root of 47391880 is about 361.8828309381.

The spelling of 47391880 in words is "forty-seven million, three hundred ninety-one thousand, eight hundred eighty".