190143945 has 24 divisors (see below), whose sum is σ = 330033600. Its totient is φ = 101271456.

The previous prime is 190143931. The next prime is 190143977. The reversal of 190143945 is 549341091.

It is a happy number.

It is not a de Polignac number, because 190143945 - 2⁹ = 190143433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36196 + ... + 41114.

It is an arithmetic number, because the mean of its divisors is an integer number (13751400).

Almost surely, 2^190143945 is an apocalyptic number.

190143945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190143945 is a deficient number, since it is larger than the sum of its proper divisors (139889655).

190143945 is a wasteful number, since it uses less digits than its factorization.

190143945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5789 (or 5786 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 190143945 is about 13789.2691974593. The cubic root of 190143945 is about 575.0348510697.

The spelling of 190143945 in words is "one hundred ninety million, one hundred forty-three thousand, nine hundred forty-five".