187013428 has 24 divisors (see below), whose sum is σ = 393713600. Its totient is φ = 75930048.

The previous prime is 187013417. The next prime is 187013443. The reversal of 187013428 is 824310781.

It is a happy number.

It is a super-2 number, since 2×187013428² = 69948044504622368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 187013393 and 187013402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 175233 + ... + 176296.

Almost surely, 2^187013428 is an apocalyptic number.

It is an amenable number.

187013428 is an abundant number, since it is smaller than the sum of its proper divisors (206700172).

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

187013428 is a wasteful number, since it uses less digits than its factorization.

187013428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351559 (or 351557 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 187013428 is about 13675.2852986693. The cubic root of 187013428 is about 571.8615938132.

The spelling of 187013428 in words is "one hundred eighty-seven million, thirteen thousand, four hundred twenty-eight".