47767780 has 24 divisors (see below), whose sum is σ = 104674752. Its totient is φ = 18276192.

The previous prime is 47767771. The next prime is 47767781. The reversal of 47767780 is 8776774.

It is a super-2 number, since 2×47767780² = 4563521612256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 47767780.

It is not an unprimeable number, because it can be changed into a prime (47767781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51462 + ... + 52381.

It is an arithmetic number, because the mean of its divisors is an integer number (4361448).

Almost surely, 2^47767780 is an apocalyptic number.

It is an amenable number.

47767780 is an abundant number, since it is smaller than the sum of its proper divisors (56906972).

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

47767780 is a wasteful number, since it uses less digits than its factorization.

47767780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103875 (or 103873 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 47767780 is about 6911.4238764527. The cubic root of 47767780 is about 362.8370990289.

The spelling of 47767780 in words is "forty-seven million, seven hundred sixty-seven thousand, seven hundred eighty".