79087770 has 48 divisors (see below), whose sum is σ = 210653352. Its totient is φ = 20574720.

The previous prime is 79087753. The next prime is 79087783. The reversal of 79087770 is 7778097.

It can be written as a sum of positive squares in 4 ways, for example, as 23242041 + 55845729 = 4821^2 + 7473^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7027 + ... + 14406.

Almost surely, 2^79087770 is an apocalyptic number.

79087770 is an abundant number, since it is smaller than the sum of its proper divisors (131565582).

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

79087770 is a wasteful number, since it uses less digits than its factorization.

79087770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21487 (or 21484 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 45.

The square root of 79087770 is about 8893.1304949382. The cubic root of 79087770 is about 429.2428898244.

The spelling of 79087770 in words is "seventy-nine million, eighty-seven thousand, seven hundred seventy".