78506410 has 16 divisors (see below), whose sum is σ = 142250112. Its totient is φ = 31194000.

The previous prime is 78506399. The next prime is 78506413. The reversal of 78506410 is 1460587.

It is a super-2 number, since 2×78506410² = 12326512822176200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78506413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24486 + ... + 27505.

It is an arithmetic number, because the mean of its divisors is an integer number (8890632).

Almost surely, 2^78506410 is an apocalyptic number.

78506410 is a deficient number, since it is larger than the sum of its proper divisors (63743702).

78506410 is a wasteful number, since it uses less digits than its factorization.

78506410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52149.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78506410 is about 8860.3843031778. The cubic root of 78506410 is about 428.1885396663.

Adding to 78506410 its reverse (1460587), we get a palindrome (79966997).

The spelling of 78506410 in words is "seventy-eight million, five hundred six thousand, four hundred ten".