84257478 has 12 divisors (see below), whose sum is σ = 182557908. Its totient is φ = 28085820.

The previous prime is 84257477. The next prime is 84257507. The reversal of 84257478 is 87475248.

84257478 is a `hidden beast` number, since 8 + 4 + 2 + 574 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84257477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2340468 + ... + 2340503.

It is an arithmetic number, because the mean of its divisors is an integer number (15213159).

Almost surely, 2^84257478 is an apocalyptic number.

84257478 is an abundant number, since it is smaller than the sum of its proper divisors (98300430).

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

84257478 is a wasteful number, since it uses less digits than its factorization.

84257478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680979 (or 4680976 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 84257478 is about 9179.1872189209. The cubic root of 84257478 is about 438.3989297208.

The spelling of 84257478 in words is "eighty-four million, two hundred fifty-seven thousand, four hundred seventy-eight".