47785720 has 32 divisors (see below), whose sum is σ = 112194720. Its totient is φ = 18282880.

The previous prime is 47785711. The next prime is 47785733. The reversal of 47785720 is 2758774.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25051 + ... + 26890.

It is an arithmetic number, because the mean of its divisors is an integer number (3506085).

Almost surely, 2^47785720 is an apocalyptic number.

47785720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47785720 is an abundant number, since it is smaller than the sum of its proper divisors (64409000).

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

47785720 is a wasteful number, since it uses less digits than its factorization.

47785720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51975 (or 51971 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 47785720 is about 6912.7216058511. The cubic root of 47785720 is about 362.8825165526.

The spelling of 47785720 in words is "forty-seven million, seven hundred eighty-five thousand, seven hundred twenty".