189203620 has 24 divisors (see below), whose sum is σ = 398208888. Its totient is φ = 75513600.

The previous prime is 189203611. The next prime is 189203629. The reversal of 189203620 is 26302981.

It is an interprime number because it is at equal distance from previous prime (189203611) and next prime (189203629).

It can be written as a sum of positive squares in 4 ways, for example, as 16859236 + 172344384 = 4106^2 + 13128^2 .

It is a super-2 number, since 2×189203620² = 71596019642208800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189203629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041 + ... + 19480.

It is an arithmetic number, because the mean of its divisors is an integer number (16592037).

Almost surely, 2^189203620 is an apocalyptic number.

189203620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189203620 is an abundant number, since it is smaller than the sum of its proper divisors (209005268).

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

189203620 is a wasteful number, since it uses less digits than its factorization.

189203620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20991 (or 20989 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 189203620 is about 13755.1306791321. The cubic root of 189203620 is about 574.0853713664.

The spelling of 189203620 in words is "one hundred eighty-nine million, two hundred three thousand, six hundred twenty".