78232570 has 32 divisors (see below), whose sum is σ = 153069840. Its totient is φ = 28615680.

The previous prime is 78232559. The next prime is 78232571. The reversal of 78232570 is 7523287.

It can be written as a sum of positive squares in 8 ways, for example, as 18464209 + 59768361 = 4297^2 + 7731^2 .

It is a super-2 number, since 2×78232570² = 12240670017609800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78232571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11410 + ... + 16930.

Almost surely, 2^78232570 is an apocalyptic number.

78232570 is a deficient number, since it is larger than the sum of its proper divisors (74837270).

78232570 is a wasteful number, since it uses less digits than its factorization.

78232570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 78232570 is about 8844.9177497589. The cubic root of 78232570 is about 427.6901016068.

The spelling of 78232570 in words is "seventy-eight million, two hundred thirty-two thousand, five hundred seventy".