78290323 has 4 divisors (see below), whose sum is σ = 78311968. Its totient is φ = 78268680.

The previous prime is 78290299. The next prime is 78290339. The reversal of 78290323 is 32309287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32309287 = 263 ⋅122849.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78290323 is a prime.

It is a super-2 number, since 2×78290323² = 12258749350888658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78293323) 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, 3936 + ... + 13117.

It is an arithmetic number, because the mean of its divisors is an integer number (19577992).

Almost surely, 2^78290323 is an apocalyptic number.

78290323 is a deficient number, since it is larger than the sum of its proper divisors (21645).

78290323 is a wasteful number, since it uses less digits than its factorization.

78290323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21644.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 78290323 is about 8848.1819036455. The cubic root of 78290323 is about 427.7953191260.

The spelling of 78290323 in words is "seventy-eight million, two hundred ninety thousand, three hundred twenty-three".