189991350 has 36 divisors (see below), whose sum is σ = 510444636. Its totient is φ = 50664240.

The previous prime is 189991301. The next prime is 189991357. The reversal of 189991350 is 53199981.

189991350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×189991350³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 189991296 and 189991305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189991357) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 210652 + ... + 211551.

Almost surely, 2^189991350 is an apocalyptic number.

189991350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189991350 is an abundant number, since it is smaller than the sum of its proper divisors (320453286).

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

189991350 is a wasteful number, since it uses less digits than its factorization.

189991350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422221 (or 422213 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 189991350 is about 13783.7349800408. The cubic root of 189991350 is about 574.8809835586.

The spelling of 189991350 in words is "one hundred eighty-nine million, nine hundred ninety-one thousand, three hundred fifty".