190678986 has 12 divisors (see below), whose sum is σ = 413137842. Its totient is φ = 63559656.

The previous prime is 190678979. The next prime is 190678991. The reversal of 190678986 is 689876091.

It can be written as a sum of positive squares in only one way, i.e., 99380961 + 91298025 = 9969^2 + 9555^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5296621 + ... + 5296656.

Almost surely, 2^190678986 is an apocalyptic number.

190678986 is an abundant number, since it is smaller than the sum of its proper divisors (222458856).

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

190678986 is a wasteful number, since it uses less digits than its factorization.

190678986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10593285 (or 10593282 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 190678986 is about 13808.6561981968. The cubic root of 190678986 is about 575.5737043985.

The spelling of 190678986 in words is "one hundred ninety million, six hundred seventy-eight thousand, nine hundred eighty-six".