78523384 has 16 divisors (see below), whose sum is σ = 147795120. Its totient is φ = 39111360.

The previous prime is 78523351. The next prime is 78523433. The reversal of 78523384 is 48332587.

It is a super-2 number, since 2×78523384² = 12331843669622912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16557 + ... + 20764.

It is an arithmetic number, because the mean of its divisors is an integer number (9237195).

Almost surely, 2^78523384 is an apocalyptic number.

It is an amenable number.

78523384 is a deficient number, since it is larger than the sum of its proper divisors (69271736).

78523384 is a wasteful number, since it uses less digits than its factorization.

78523384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37590 (or 37586 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 78523384 is about 8861.3421105383. The cubic root of 78523384 is about 428.2193972252.

It can be divided in two parts, 7852 and 3384, that added together give a square (11236 = 106²).

The spelling of 78523384 in words is "seventy-eight million, five hundred twenty-three thousand, three hundred eighty-four".