189971944 has 8 divisors (see below), whose sum is σ = 356197410. Its totient is φ = 94985968.

The previous prime is 189971933. The next prime is 189971959. The reversal of 189971944 is 449179981.

It can be written as a sum of positive squares in only one way, i.e., 147331044 + 42640900 = 12138^2 + 6530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 189971891 and 189971900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11873239 + ... + 11873254.

Almost surely, 2^189971944 is an apocalyptic number.

It is an amenable number.

189971944 is a deficient number, since it is larger than the sum of its proper divisors (166225466).

189971944 is a wasteful number, since it uses less digits than its factorization.

189971944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23746499 (or 23746495 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 189971944 is about 13783.0310164347. The cubic root of 189971944 is about 574.8614098250.

The spelling of 189971944 in words is "one hundred eighty-nine million, nine hundred seventy-one thousand, nine hundred forty-four".