78672898 has 4 divisors (see below), whose sum is σ = 118009350. Its totient is φ = 39336448.

The previous prime is 78672883. The next prime is 78672943. The reversal of 78672898 is 89827687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74080449 + 4592449 = 8607^2 + 2143^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19668223 + ... + 19668226.

Almost surely, 2^78672898 is an apocalyptic number.

78672898 is a deficient number, since it is larger than the sum of its proper divisors (39336452).

78672898 is a wasteful number, since it uses less digits than its factorization.

78672898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39336451.

The product of its digits is 2709504, while the sum is 55.

The square root of 78672898 is about 8869.7744052484. The cubic root of 78672898 is about 428.4910114406.

The spelling of 78672898 in words is "seventy-eight million, six hundred seventy-two thousand, eight hundred ninety-eight".