78418670 has 64 divisors (see below), whose sum is σ = 160807680. Its totient is φ = 27283200.

The previous prime is 78418601. The next prime is 78418673. The reversal of 78418670 is 7681487.

It is a super-2 number, since 2×78418670² = 12298975609137800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78418673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278930 + ... + 279210.

It is an arithmetic number, because the mean of its divisors is an integer number (2512620).

Almost surely, 2^78418670 is an apocalyptic number.

78418670 is an abundant number, since it is smaller than the sum of its proper divisors (82389010).

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

78418670 is a wasteful number, since it uses less digits than its factorization.

78418670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78418670 is about 8855.4316664971. The cubic root of 78418670 is about 428.0289634518.

The spelling of 78418670 in words is "seventy-eight million, four hundred eighteen thousand, six hundred seventy".