47861920 has 24 divisors (see below), whose sum is σ = 113074164. Its totient is φ = 19144704.

The previous prime is 47861917. The next prime is 47861971. The reversal of 47861920 is 2916874.

It can be written as a sum of positive squares in 2 ways, for example, as 46294416 + 1567504 = 6804^2 + 1252^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 47861920.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149409 + ... + 149728.

Almost surely, 2^47861920 is an apocalyptic number.

47861920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47861920 is an abundant number, since it is smaller than the sum of its proper divisors (65212244).

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

47861920 is a wasteful number, since it uses less digits than its factorization.

47861920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299152 (or 299144 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 47861920 is about 6918.2309877598. The cubic root of 47861920 is about 363.0753005253.

The spelling of 47861920 in words is "forty-seven million, eight hundred sixty-one thousand, nine hundred twenty".