686263690 has 64 divisors (see below), whose sum is σ = 1440011520. Its totient is φ = 230630400.

The previous prime is 686263687. The next prime is 686263727. The reversal of 686263690 is 96362686.

It is a happy number.

686263690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686263690² = 941915704424832200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 686263690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798481 + ... + 799339.

It is an arithmetic number, because the mean of its divisors is an integer number (22500180).

Almost surely, 2^686263690 is an apocalyptic number.

686263690 is an abundant number, since it is smaller than the sum of its proper divisors (753747830).

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

686263690 is a wasteful number, since it uses less digits than its factorization.

686263690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 686263690 is about 26196.6350892629. The cubic root of 686263690 is about 882.0577233695.

The spelling of 686263690 in words is "six hundred eighty-six million, two hundred sixty-three thousand, six hundred ninety".