844612690 has 16 divisors (see below), whose sum is σ = 1561392792. Its totient is φ = 328713984.

The previous prime is 844612679. The next prime is 844612709. The reversal of 844612690 is 96216448.

It can be written as a sum of positive squares in 4 ways, for example, as 676884289 + 167728401 = 26017^2 + 12951^2 .

It is a super-2 number, since 2×844612690² = 1426741192218072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140999 + ... + 1141738.

Almost surely, 2^844612690 is an apocalyptic number.

844612690 is a deficient number, since it is larger than the sum of its proper divisors (716780102).

844612690 is a wasteful number, since it uses less digits than its factorization.

844612690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282781.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 844612690 is about 29062.2210094136. The cubic root of 844612690 is about 945.2627284762.

The spelling of 844612690 in words is "eight hundred forty-four million, six hundred twelve thousand, six hundred ninety".