189894840 has 64 divisors (see below), whose sum is σ = 588072960. Its totient is φ = 49004160.

The previous prime is 189894829. The next prime is 189894851. The reversal of 189894840 is 48498981.

It is an interprime number because it is at equal distance from previous prime (189894829) and next prime (189894851).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21804 + ... + 29243.

It is an arithmetic number, because the mean of its divisors is an integer number (9188640).

Almost surely, 2^189894840 is an apocalyptic number.

189894840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189894840 is an abundant number, since it is smaller than the sum of its proper divisors (398178120).

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

189894840 is a wasteful number, since it uses less digits than its factorization.

189894840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51092 (or 51088 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 189894840 is about 13780.2336700072. The cubic root of 189894840 is about 574.7836262127.

The spelling of 189894840 in words is "one hundred eighty-nine million, eight hundred ninety-four thousand, eight hundred forty".