190845861 has 16 divisors (see below), whose sum is σ = 268823040. Its totient is φ = 120098160.

The previous prime is 190845847. The next prime is 190845869. The reversal of 190845861 is 168548091.

It is not a de Polignac number, because 190845861 - 2⁶ = 190845797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190845869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10216 + ... + 22046.

It is an arithmetic number, because the mean of its divisors is an integer number (16801440).

Almost surely, 2^190845861 is an apocalyptic number.

It is an amenable number.

190845861 is a deficient number, since it is larger than the sum of its proper divisors (77977179).

190845861 is a wasteful number, since it uses less digits than its factorization.

190845861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12136.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 190845861 is about 13814.6972822426. The cubic root of 190845861 is about 575.7415621825.

The spelling of 190845861 in words is "one hundred ninety million, eight hundred forty-five thousand, eight hundred sixty-one".