78523284 has 36 divisors (see below), whose sum is σ = 213136224. Its totient is φ = 22435056.

The previous prime is 78523177. The next prime is 78523297. The reversal of 78523284 is 48232587.

It is a super-2 number, since 2×78523284² = 12331812260289312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66184 + ... + 67359.

Almost surely, 2^78523284 is an apocalyptic number.

It is an amenable number.

78523284 is an abundant number, since it is smaller than the sum of its proper divisors (134612940).

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

78523284 is a wasteful number, since it uses less digits than its factorization.

78523284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133564 (or 133555 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 78523284 is about 8861.3364680504. The cubic root of 78523284 is about 428.2192154452.

The spelling of 78523284 in words is "seventy-eight million, five hundred twenty-three thousand, two hundred eighty-four".