190090906 has 48 divisors (see below), whose sum is σ = 321834240. Its totient is φ = 84015360.

The previous prime is 190090903. The next prime is 190090921. The reversal of 190090906 is 609090091.

It is a happy number.

190090906 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190090906² = 72269105087801672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190090903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1050136 + ... + 1050316.

It is an arithmetic number, because the mean of its divisors is an integer number (6704880).

Almost surely, 2^190090906 is an apocalyptic number.

190090906 is a deficient number, since it is larger than the sum of its proper divisors (131743334).

190090906 is a wasteful number, since it uses less digits than its factorization.

190090906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 190090906 is about 13787.3458649589. The cubic root of 190090906 is about 574.9813791071.

The spelling of 190090906 in words is "one hundred ninety million, ninety thousand, nine hundred six".