47717478 has 32 divisors (see below), whose sum is σ = 106293600. Its totient is φ = 15867648.

The previous prime is 47717477. The next prime is 47717497. The reversal of 47717478 is 87471774.

It is a happy number.

47717478 is a `hidden beast` number, since 477 + 174 + 7 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47717477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29950 + ... + 31502.

It is an arithmetic number, because the mean of its divisors is an integer number (3321675).

Almost surely, 2^47717478 is an apocalyptic number.

47717478 is an abundant number, since it is smaller than the sum of its proper divisors (58576122).

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

47717478 is a wasteful number, since it uses less digits than its factorization.

47717478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2127 counting only the distinct ones).

The product of its digits is 307328, while the sum is 45.

The square root of 47717478 is about 6907.7838703885. The cubic root of 47717478 is about 362.7096920747.

It can be divided in two parts, 477 and 17478, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 47717478 in words is "forty-seven million, seven hundred seventeen thousand, four hundred seventy-eight".