190663890 has 64 divisors (see below), whose sum is σ = 465696000. Its totient is φ = 49953024.

The previous prime is 190663877. The next prime is 190663903. The reversal of 190663890 is 98366091.

190663890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (190663877) and next prime (190663903).

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, 650584 + ... + 650876.

It is an arithmetic number, because the mean of its divisors is an integer number (7276500).

Almost surely, 2^190663890 is an apocalyptic number.

190663890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

190663890 is an abundant number, since it is smaller than the sum of its proper divisors (275032110).

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

190663890 is a wasteful number, since it uses less digits than its factorization.

190663890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 190663890 is about 13808.1095737251. The cubic root of 190663890 is about 575.5585146633.

The spelling of 190663890 in words is "one hundred ninety million, six hundred sixty-three thousand, eight hundred ninety".