189949320 has 256 divisors, whose sum is σ = 705024000. Its totient is φ = 45100800.

The previous prime is 189949283. The next prime is 189949337. The reversal of 189949320 is 23949981.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 700785 + ... + 701055.

It is an arithmetic number, because the mean of its divisors is an integer number (2754000).

Almost surely, 2^189949320 is an apocalyptic number.

189949320 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 189949320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352512000).

189949320 is an abundant number, since it is smaller than the sum of its proper divisors (515074680).

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

189949320 is a wasteful number, since it uses less digits than its factorization.

189949320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 189949320 is about 13782.2102726667. The cubic root of 189949320 is about 574.8385885940.

The spelling of 189949320 in words is "one hundred eighty-nine million, nine hundred forty-nine thousand, three hundred twenty".