187233428 has 12 divisors (see below), whose sum is σ = 338228352. Its totient is φ = 90596760.

The previous prime is 187233421. The next prime is 187233451. The reversal of 187233428 is 824332781.

It is a junction number, because it is equal to n+sod(n) for n = 187233391 and 187233400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187233421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754850 + ... + 755097.

It is an arithmetic number, because the mean of its divisors is an integer number (28185696).

Almost surely, 2^187233428 is an apocalyptic number.

It is an amenable number.

187233428 is a deficient number, since it is larger than the sum of its proper divisors (150994924).

187233428 is a wasteful number, since it uses less digits than its factorization.

187233428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509982 (or 1509980 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 187233428 is about 13683.3266423045. The cubic root of 187233428 is about 572.0857492845.

The spelling of 187233428 in words is "one hundred eighty-seven million, two hundred thirty-three thousand, four hundred twenty-eight".