686000190 has 32 divisors (see below), whose sum is σ = 1649219616. Its totient is φ = 182620160.

The previous prime is 686000177. The next prime is 686000197. The reversal of 686000190 is 91000686.

It is a super-2 number, since 2×686000190² = 941192521360072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686000197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491 + ... + 37070.

It is an arithmetic number, because the mean of its divisors is an integer number (51538113).

Almost surely, 2^686000190 is an apocalyptic number.

686000190 is an abundant number, since it is smaller than the sum of its proper divisors (963219426).

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

686000190 is a wasteful number, since it uses less digits than its factorization.

686000190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39164.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 686000190 is about 26191.6053345342. The cubic root of 686000190 is about 881.9448163499.

The spelling of 686000190 in words is "six hundred eighty-six million, one hundred ninety", and thus it is an aban number.