813189190 has 16 divisors (see below), whose sum is σ = 1596808080. Its totient is φ = 295705120.

The previous prime is 813189187. The next prime is 813189197. The reversal of 813189190 is 91981318.

It is a happy number.

It is a super-2 number, since 2×813189190² = 1322553317465712200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813189197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3696205 + ... + 3696424.

It is an arithmetic number, because the mean of its divisors is an integer number (99800505).

Almost surely, 2^813189190 is an apocalyptic number.

813189190 is a deficient number, since it is larger than the sum of its proper divisors (783618890).

813189190 is a wasteful number, since it uses less digits than its factorization.

813189190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392647.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 813189190 is about 28516.4722572761. The cubic root of 813189190 is about 933.3915514989.

The spelling of 813189190 in words is "eight hundred thirteen million, one hundred eighty-nine thousand, one hundred ninety".