18649748 has 48 divisors (see below), whose sum is σ = 37855440. Its totient is φ = 7990272.

The previous prime is 18649747. The next prime is 18649753. The reversal of 18649748 is 84794681.

It can be written as a sum of positive squares in 8 ways, for example, as 228484 + 18421264 = 478^2 + 4292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18649747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255440 + ... + 255512.

It is an arithmetic number, because the mean of its divisors is an integer number (788655).

Almost surely, 2^18649748 is an apocalyptic number.

It is an amenable number.

18649748 is an abundant number, since it is smaller than the sum of its proper divisors (19205692).

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

18649748 is a wasteful number, since it uses less digits than its factorization.

18649748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 105 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 18649748 is about 4318.5353998781. The cubic root of 18649748 is about 265.1903130365.

The spelling of 18649748 in words is "eighteen million, six hundred forty-nine thousand, seven hundred forty-eight".