189551340 has 180 divisors, whose sum is σ = 654277008. Its totient is φ = 45904320.

The previous prime is 189551321. The next prime is 189551347. The reversal of 189551340 is 43155981.

189551340 is a `hidden beast` number, since 18 + 95 + 513 + 40 = 666.

189551340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 189551295 and 189551304.

It is not an unprimeable number, because it can be changed into a prime (189551347) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 195537 + ... + 196503.

Almost surely, 2^189551340 is an apocalyptic number.

189551340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189551340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327138504).

189551340 is an abundant number, since it is smaller than the sum of its proper divisors (464725668).

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

189551340 is a wasteful number, since it uses less digits than its factorization.

189551340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 189551340 is about 13767.7645244244. The cubic root of 189551340 is about 574.4368424459.

It can be divided in two parts, 1895 and 51340, that added together give a palindrome (53235).

The spelling of 189551340 in words is "one hundred eighty-nine million, five hundred fifty-one thousand, three hundred forty".