190506864 has 20 divisors (see below), whose sum is σ = 492142856. Its totient is φ = 63502272.

The previous prime is 190506853. The next prime is 190506919. The reversal of 190506864 is 468605091.

It is a super-2 number, since 2×190506864² = 72585730462228992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984399 + ... + 1984494.

Almost surely, 2^190506864 is an apocalyptic number.

It is an amenable number.

190506864 is an abundant number, since it is smaller than the sum of its proper divisors (301635992).

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

190506864 is a wasteful number, since it uses less digits than its factorization.

190506864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968904 (or 3968898 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 190506864 is about 13802.4223960869. The cubic root of 190506864 is about 575.4004660791.

The spelling of 190506864 in words is "one hundred ninety million, five hundred six thousand, eight hundred sixty-four".