78643802 has 8 divisors (see below), whose sum is σ = 124904916. Its totient is φ = 37008832.

The previous prime is 78643801. The next prime is 78643813. The reversal of 78643802 is 20834687.

It can be written as a sum of positive squares in 2 ways, for example, as 78340201 + 303601 = 8851^2 + 551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78643801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156493 + ... + 1156560.

Almost surely, 2^78643802 is an apocalyptic number.

78643802 is a deficient number, since it is larger than the sum of its proper divisors (46261114).

78643802 is a wasteful number, since it uses less digits than its factorization.

78643802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313072.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 78643802 is about 8868.1340765688. The cubic root of 78643802 is about 428.4381812536.

The spelling of 78643802 in words is "seventy-eight million, six hundred forty-three thousand, eight hundred two".