687228190 has 16 divisors (see below), whose sum is σ = 1349466480. Its totient is φ = 249901120.

The previous prime is 687228187. The next prime is 687228197. The reversal of 687228190 is 91822786.

687228190 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 2×687228190² = 944565170261352200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687228197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3123655 + ... + 3123874.

It is an arithmetic number, because the mean of its divisors is an integer number (84341655).

Almost surely, 2^687228190 is an apocalyptic number.

687228190 is a deficient number, since it is larger than the sum of its proper divisors (662238290).

687228190 is a wasteful number, since it uses less digits than its factorization.

687228190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247547.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 687228190 is about 26215.0374785160. The cubic root of 687228190 is about 882.4707552898.

The spelling of 687228190 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, one hundred ninety".