78643614 has 32 divisors (see below), whose sum is σ = 180331776. Its totient is φ = 22397760.

The previous prime is 78643613. The next prime is 78643619. The reversal of 78643614 is 41634687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78643613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11074 + ... + 16730.

It is an arithmetic number, because the mean of its divisors is an integer number (5635368).

Almost surely, 2^78643614 is an apocalyptic number.

78643614 is an abundant number, since it is smaller than the sum of its proper divisors (101688162).

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

78643614 is a wasteful number, since it uses less digits than its factorization.

78643614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000.

The product of its digits is 96768, while the sum is 39.

The square root of 78643614 is about 8868.1234768129. The cubic root of 78643614 is about 428.4378398559.

The spelling of 78643614 in words is "seventy-eight million, six hundred forty-three thousand, six hundred fourteen".