79490 has 8 divisors (see below), whose sum is σ = 143100. Its totient is φ = 31792.

The previous prime is 79481. The next prime is 79493. The reversal of 79490 is 9497.

It can be written as a sum of positive squares in 2 ways, for example, as 78961 + 529 = 281^2 + 23^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79493) by changing a digit.

79490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965 + ... + 3984.

2⁷⁹⁴⁹⁰ is an apocalyptic number.

79490 is a deficient number, since it is larger than the sum of its proper divisors (63610).

79490 is a wasteful number, since it uses less digits than its factorization.

79490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 79490 is about 281.9397098672. The cubic root of 79490 is about 42.9969350619.

It can be divided in two parts, 7 and 9490, that multiplied together give a triangular number (66430 = T₃₆₄).

The spelling of 79490 in words is "seventy-nine thousand, four hundred ninety".