47957778 has 32 divisors (see below), whose sum is σ = 116262720. Its totient is φ = 14532480.

The previous prime is 47957761. The next prime is 47957807. The reversal of 47957778 is 87775974.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 39775 + ... + 40962.

It is an arithmetic number, because the mean of its divisors is an integer number (3633210).

Almost surely, 2^47957778 is an apocalyptic number.

47957778 is an abundant number, since it is smaller than the sum of its proper divisors (68304942).

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

47957778 is a wasteful number, since it uses less digits than its factorization.

47957778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80759 (or 80753 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The square root of 47957778 is about 6925.1554495188. The cubic root of 47957778 is about 363.3175283271.

The spelling of 47957778 in words is "forty-seven million, nine hundred fifty-seven thousand, seven hundred seventy-eight".