47278464 has 32 divisors (see below), whose sum is σ = 125584440. Its totient is φ = 15759360.

The previous prime is 47278463. The next prime is 47278481. The reversal of 47278464 is 46487274.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61177 + ... + 61944.

Almost surely, 2^47278464 is an apocalyptic number.

It is an amenable number.

47278464 is an abundant number, since it is smaller than the sum of its proper divisors (78305976).

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

47278464 is a wasteful number, since it uses less digits than its factorization.

47278464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123138 (or 123126 counting only the distinct ones).

The product of its digits is 301056, while the sum is 42.

The square root of 47278464 is about 6875.9336820537. The cubic root of 47278464 is about 361.5939200690.

The spelling of 47278464 in words is "forty-seven million, two hundred seventy-eight thousand, four hundred sixty-four".