189785030 has 16 divisors (see below), whose sum is σ = 347214384. Its totient is φ = 74669280.

The previous prime is 189785027. The next prime is 189785033. The reversal of 189785030 is 30587981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (189785027) and next prime (189785033).

It is a super-2 number, since 2×189785030² = 72036715224201800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189785033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154952 + ... + 156171.

It is an arithmetic number, because the mean of its divisors is an integer number (21700899).

Almost surely, 2^189785030 is an apocalyptic number.

189785030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189785030 is a deficient number, since it is larger than the sum of its proper divisors (157429354).

189785030 is a wasteful number, since it uses less digits than its factorization.

189785030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311191.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 189785030 is about 13776.2487637237. The cubic root of 189785030 is about 574.6728119675.

The spelling of 189785030 in words is "one hundred eighty-nine million, seven hundred eighty-five thousand, thirty".