189993654 has 64 divisors (see below), whose sum is σ = 446688000. Its totient is φ = 59693760.

The previous prime is 189993647. The next prime is 189993659. The reversal of 189993654 is 456399981.

189993654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 189993654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189993659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287977 + ... + 288635.

It is an arithmetic number, because the mean of its divisors is an integer number (6979500).

Almost surely, 2^189993654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189993654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223344000).

189993654 is an abundant number, since it is smaller than the sum of its proper divisors (256694346).

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

189993654 is a wasteful number, since it uses less digits than its factorization.

189993654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 964 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 189993654 is about 13783.8185565539. The cubic root of 189993654 is about 574.8833073845.

The spelling of 189993654 in words is "one hundred eighty-nine million, nine hundred ninety-three thousand, six hundred fifty-four".