78290 has 8 divisors (see below), whose sum is σ = 140940. Its totient is φ = 31312.

The previous prime is 78283. The next prime is 78301. The reversal of 78290 is 9287.

It can be written as a sum of positive squares in 2 ways, for example, as 72361 + 5929 = 269^2 + 77^2 .

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

It is a super-2 number, since 2×78290² = 12258648200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905 + ... + 3924.

2⁷⁸²⁹⁰ is an apocalyptic number.

78290 is a deficient number, since it is larger than the sum of its proper divisors (62650).

78290 is a wasteful number, since it uses less digits than its factorization.

78290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 78290 is about 279.8035024799. The cubic root of 78290 is about 42.7794730811.

The spelling of 78290 in words is "seventy-eight thousand, two hundred ninety".