190998864 has 160 divisors (see below), whose sum is σ = 639840000. Its totient is φ = 54528768.

The previous prime is 190998851. The next prime is 190998881. The reversal of 190998864 is 468899091.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 190998864.

It is a congruent number.

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, 147532 + ... + 148820.

It is an arithmetic number, because the mean of its divisors is an integer number (3999000).

Almost surely, 2^190998864 is an apocalyptic number.

190998864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190998864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319920000).

190998864 is an abundant number, since it is smaller than the sum of its proper divisors (448841136).

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

190998864 is a wasteful number, since it uses less digits than its factorization.

190998864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 190998864 is about 13820.2338619866. The cubic root of 190998864 is about 575.8953803045.

The spelling of 190998864 in words is "one hundred ninety million, nine hundred ninety-eight thousand, eight hundred sixty-four".