851268690 has 40 divisors (see below), whose sum is σ = 2288969100. Its totient is φ = 227004768.

The previous prime is 851268683. The next prime is 851268751. The reversal of 851268690 is 96862158.

851268690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 774898569 + 76370121 = 27837^2 + 8739^2 .

It is a super-2 number, since 2×851268690² = 1449316765148632200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 524665 + ... + 526284.

Almost surely, 2^851268690 is an apocalyptic number.

851268690 is an abundant number, since it is smaller than the sum of its proper divisors (1437700410).

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

851268690 is a wasteful number, since it uses less digits than its factorization.

851268690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050968 (or 1050959 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 851268690 is about 29176.5092154630. The cubic root of 851268690 is about 947.7392929954.

The spelling of 851268690 in words is "eight hundred fifty-one million, two hundred sixty-eight thousand, six hundred ninety".