78136630 has 64 divisors (see below), whose sum is σ = 167178816. Its totient is φ = 25920000.

The previous prime is 78136621. The next prime is 78136631. The reversal of 78136630 is 3663187.

It is a super-2 number, since 2×78136630² = 12210665895513800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78136631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144160 + ... + 144700.

It is an arithmetic number, because the mean of its divisors is an integer number (2612169).

Almost surely, 2^78136630 is an apocalyptic number.

78136630 is an abundant number, since it is smaller than the sum of its proper divisors (89042186).

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

78136630 is a wasteful number, since it uses less digits than its factorization.

78136630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 78136630 is about 8839.4926324988. The cubic root of 78136630 is about 427.5151984383.

The spelling of 78136630 in words is "seventy-eight million, one hundred thirty-six thousand, six hundred thirty".