79090420 has 24 divisors (see below), whose sum is σ = 166257000. Its totient is φ = 31604352.

The previous prime is 79090411. The next prime is 79090421. The reversal of 79090420 is 2409097.

79090420 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 4 ways, for example, as 43401744 + 35688676 = 6588^2 + 5974^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79090421) 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, 37966 + ... + 39994.

It is an arithmetic number, because the mean of its divisors is an integer number (6927375).

Almost surely, 2^79090420 is an apocalyptic number.

It is an amenable number.

79090420 is an abundant number, since it is smaller than the sum of its proper divisors (87166580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79090420 is a wasteful number, since it uses less digits than its factorization.

79090420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987 (or 3985 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 79090420 is about 8893.2794850943. The cubic root of 79090420 is about 429.2476839957.

The spelling of 79090420 in words is "seventy-nine million, ninety thousand, four hundred twenty".