190537890 has 64 divisors (see below), whose sum is σ = 483840000. Its totient is φ = 47888064.

The previous prime is 190537889. The next prime is 190537903. The reversal of 190537890 is 98735091.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126361 + ... + 127859.

It is an arithmetic number, because the mean of its divisors is an integer number (7560000).

Almost surely, 2^190537890 is an apocalyptic number.

190537890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190537890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241920000).

190537890 is an abundant number, since it is smaller than the sum of its proper divisors (293302110).

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

190537890 is a wasteful number, since it uses less digits than its factorization.

190537890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 190537890 is about 13803.5462834737. The cubic root of 190537890 is about 575.4317010093.

The spelling of 190537890 in words is "one hundred ninety million, five hundred thirty-seven thousand, eight hundred ninety".