189644470 has 16 divisors (see below), whose sum is σ = 341658288. Its totient is φ = 75791520.

The previous prime is 189644461. The next prime is 189644471. The reversal of 189644470 is 74446981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189644471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4705 + ... + 20035.

It is an arithmetic number, because the mean of its divisors is an integer number (21353643).

Almost surely, 2^189644470 is an apocalyptic number.

189644470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189644470 is a deficient number, since it is larger than the sum of its proper divisors (152013818).

189644470 is a wasteful number, since it uses less digits than its factorization.

189644470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16575.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 189644470 is about 13771.1462848958. The cubic root of 189644470 is about 574.5309041112.

The spelling of 189644470 in words is "one hundred eighty-nine million, six hundred forty-four thousand, four hundred seventy".