189190436 has 6 divisors (see below), whose sum is σ = 331083270. Its totient is φ = 94595216.

The previous prime is 189190423. The next prime is 189190439. The reversal of 189190436 is 634091981.

It can be written as a sum of positive squares in only one way, i.e., 175721536 + 13468900 = 13256^2 + 3670^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189190393 and 189190402.

It is not an unprimeable number, because it can be changed into a prime (189190439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23648801 + ... + 23648808.

It is an arithmetic number, because the mean of its divisors is an integer number (55180545).

Almost surely, 2^189190436 is an apocalyptic number.

It is an amenable number.

189190436 is a deficient number, since it is larger than the sum of its proper divisors (141892834).

189190436 is a wasteful number, since it uses less digits than its factorization.

189190436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47297613 (or 47297611 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 189190436 is about 13754.6514314249. The cubic root of 189190436 is about 574.0720366721.

The spelling of 189190436 in words is "one hundred eighty-nine million, one hundred ninety thousand, four hundred thirty-six".