189394140 has 48 divisors (see below), whose sum is σ = 571098528. Its totient is φ = 46619904.

The previous prime is 189394111. The next prime is 189394141. The reversal of 189394140 is 41493981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189394141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120627 + ... + 122186.

It is an arithmetic number, because the mean of its divisors is an integer number (11897886).

Almost surely, 2^189394140 is an apocalyptic number.

189394140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189394140 is an abundant number, since it is smaller than the sum of its proper divisors (381704388).

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

189394140 is a wasteful number, since it uses less digits than its factorization.

189394140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242838 (or 242836 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 189394140 is about 13762.0543524577. The cubic root of 189394140 is about 574.2779999105.

It can be divided in two parts, 1893941 and 40, that added together give a palindrome (1893981).

The spelling of 189394140 in words is "one hundred eighty-nine million, three hundred ninety-four thousand, one hundred forty".