47978550 has 36 divisors (see below), whose sum is σ = 128903580. Its totient is φ = 12794160.

The previous prime is 47978527. The next prime is 47978551. The reversal of 47978550 is 5587974.

47978550 is a `hidden beast` number, since 4 + 7 + 97 + 8 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47978496 and 47978505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47978551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 52860 + ... + 53759.

It is an arithmetic number, because the mean of its divisors is an integer number (3580655).

Almost surely, 2^47978550 is an apocalyptic number.

47978550 is an abundant number, since it is smaller than the sum of its proper divisors (80925030).

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

47978550 is a wasteful number, since it uses less digits than its factorization.

47978550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106637 (or 106629 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 47978550 is about 6926.6550368847. The cubic root of 47978550 is about 363.3699754496.

The spelling of 47978550 in words is "forty-seven million, nine hundred seventy-eight thousand, five hundred fifty".