78057284 has 12 divisors (see below), whose sum is σ = 136699584. Its totient is φ = 39000264.

The previous prime is 78057283. The next prime is 78057289. The reversal of 78057284 is 48275087.

It is not an unprimeable number, because it can be changed into a prime (78057281) 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, 152 + ... + 12495.

It is an arithmetic number, because the mean of its divisors is an integer number (11391632).

Almost surely, 2^78057284 is an apocalyptic number.

It is an amenable number.

78057284 is a deficient number, since it is larger than the sum of its proper divisors (58642300).

78057284 is a wasteful number, since it uses less digits than its factorization.

78057284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14194 (or 14192 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 78057284 is about 8835.0033389920. The cubic root of 78057284 is about 427.3704387200.

The spelling of 78057284 in words is "seventy-eight million, fifty-seven thousand, two hundred eighty-four".