189450540 has 144 divisors (see below), whose sum is σ = 609493248. Its totient is φ = 47532672.

The previous prime is 189450529. The next prime is 189450551. The reversal of 189450540 is 45054981.

It is an interprime number because it is at equal distance from previous prime (189450529) and next prime (189450551).

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 = 189450495 and 189450504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277039 + ... + 277721.

It is an arithmetic number, because the mean of its divisors is an integer number (4232592).

Almost surely, 2^189450540 is an apocalyptic number.

189450540 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 189450540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304746624).

189450540 is an abundant number, since it is smaller than the sum of its proper divisors (420042708).

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

189450540 is a wasteful number, since it uses less digits than its factorization.

189450540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 189450540 is about 13764.1033126027. The cubic root of 189450540 is about 574.3349993239.

The spelling of 189450540 in words is "one hundred eighty-nine million, four hundred fifty thousand, five hundred forty".