187749252 has 30 divisors (see below), whose sum is σ = 490814478. Its totient is φ = 62582976.

The previous prime is 187749217. The next prime is 187749257. The reversal of 187749252 is 252947781.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 160123716 + 27625536 = 12654^2 + 5256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 187749198 and 187749207.

It is not an unprimeable number, because it can be changed into a prime (187749257) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 289413 + ... + 290060.

Almost surely, 2^187749252 is an apocalyptic number.

187749252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

187749252 is an abundant number, since it is smaller than the sum of its proper divisors (303065226).

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

187749252 is a wasteful number, since it uses less digits than its factorization.

187749252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579489 (or 579478 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 187749252 is about 13702.1623111099. The cubic root of 187749252 is about 572.6106288119.

The spelling of 187749252 in words is "one hundred eighty-seven million, seven hundred forty-nine thousand, two hundred fifty-two".