189469440 has 108 divisors (see below), whose sum is σ = 655584384. Its totient is φ = 50522112.

The previous prime is 189469433. The next prime is 189469447. The reversal of 189469440 is 44964981.

189469440 is a `hidden beast` number, since 189 + 469 + 4 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (189469433) and next prime (189469447).

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

It is not an unprimeable number, because it can be changed into a prime (189469447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3297 + ... + 19743.

Almost surely, 2^189469440 is an apocalyptic number.

189469440 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 189469440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327792192).

189469440 is an abundant number, since it is smaller than the sum of its proper divisors (466114944).

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

189469440 is a wasteful number, since it uses less digits than its factorization.

189469440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16474 (or 16457 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 189469440 is about 13764.7898639972. The cubic root of 189469440 is about 574.3540976605.

The spelling of 189469440 in words is "one hundred eighty-nine million, four hundred sixty-nine thousand, four hundred forty".