187428935484 has 108 divisors (see below), whose sum is σ = 551868084768. Its totient is φ = 53479440000.

The previous prime is 187428935471. The next prime is 187428935501. The reversal of 187428935484 is 484539824781.

It is a happy number.

187428935484 is a `hidden beast` number, since 1 + 8 + 7 + 4 + 2 + 89 + 3 + 548 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1254024 + ... + 1395504.

Almost surely, 2^187428935484 is an apocalyptic number.

187428935484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187428935484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275934042384).

187428935484 is an abundant number, since it is smaller than the sum of its proper divisors (364439149284).

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

187428935484 is a wasteful number, since it uses less digits than its factorization.

187428935484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142256 (or 142244 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 187428935484 in words is "one hundred eighty-seven billion, four hundred twenty-eight million, nine hundred thirty-five thousand, four hundred eighty-four".