78369339 has 8 divisors (see below), whose sum is σ = 108095760. Its totient is φ = 50444576.

The previous prime is 78369331. The next prime is 78369353. The reversal of 78369339 is 93396387.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78369339 - 2³ = 78369331 is a prime.

It is a super-2 number, since 2×78369339² = 12283506590593842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78369331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450312 + ... + 450485.

It is an arithmetic number, because the mean of its divisors is an integer number (13511970).

Almost surely, 2^78369339 is an apocalyptic number.

78369339 is a deficient number, since it is larger than the sum of its proper divisors (29726421).

78369339 is a wasteful number, since it uses less digits than its factorization.

78369339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900829.

The product of its digits is 734832, while the sum is 48.

The square root of 78369339 is about 8852.6458756690. The cubic root of 78369339 is about 427.9391909270.

The spelling of 78369339 in words is "seventy-eight million, three hundred sixty-nine thousand, three hundred thirty-nine".