189769856 has 16 divisors (see below), whose sum is σ = 378057390. Its totient is φ = 94884864.

The previous prime is 189769843. The next prime is 189769859. The reversal of 189769856 is 658967981.

It can be written as a sum of positive squares in only one way, i.e., 160782400 + 28987456 = 12680^2 + 5384^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 189769795 and 189769804.

It is not an unprimeable number, because it can be changed into a prime (189769859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 741161 + ... + 741416.

Almost surely, 2^189769856 is an apocalyptic number.

189769856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189769856 is a deficient number, since it is larger than the sum of its proper divisors (188287534).

189769856 is an equidigital number, since it uses as much as digits as its factorization.

189769856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482591 (or 1482579 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 59.

The square root of 189769856 is about 13775.6980222419. The cubic root of 189769856 is about 574.6574958356.

The spelling of 189769856 in words is "one hundred eighty-nine million, seven hundred sixty-nine thousand, eight hundred fifty-six".