797578690 has 8 divisors (see below), whose sum is σ = 1435641660. Its totient is φ = 319031472.

The previous prime is 797578687. The next prime is 797578709. The reversal of 797578690 is 96875797.

It can be written as a sum of positive squares in 2 ways, for example, as 728838009 + 68740681 = 26997^2 + 8291^2 .

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

It is a super-2 number, since 2×797578690² = 1272263533484232200, 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, 39878925 + ... + 39878944.

Almost surely, 2^797578690 is an apocalyptic number.

797578690 is a deficient number, since it is larger than the sum of its proper divisors (638062970).

797578690 is a wasteful number, since it uses less digits than its factorization.

797578690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79757876.

The product of its (nonzero) digits is 6667920, while the sum is 58.

The square root of 797578690 is about 28241.4356929672. The cubic root of 797578690 is about 927.3802597993.

The spelling of 797578690 in words is "seven hundred ninety-seven million, five hundred seventy-eight thousand, six hundred ninety".