78135706 has 32 divisors (see below), whose sum is σ = 137712960. Its totient is φ = 32851200.

The previous prime is 78135691. The next prime is 78135719. The reversal of 78135706 is 60753187.

It is a super-2 number, since 2×78135706² = 12210377104236872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20296 + ... + 23836.

It is an arithmetic number, because the mean of its divisors is an integer number (4303530).

Almost surely, 2^78135706 is an apocalyptic number.

78135706 is a deficient number, since it is larger than the sum of its proper divisors (59577254).

78135706 is a wasteful number, since it uses less digits than its factorization.

78135706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 78135706 is about 8839.4403669011. The cubic root of 78135706 is about 427.5135132466.

The spelling of 78135706 in words is "seventy-eight million, one hundred thirty-five thousand, seven hundred six".