18861248 has 28 divisors (see below), whose sum is σ = 42775632. Its totient is φ = 8083200.

The previous prime is 18861247. The next prime is 18861277. The reversal of 18861248 is 84216881.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×18861248² = 711493352235008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18861247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20603 + ... + 21498.

Almost surely, 2^18861248 is an apocalyptic number.

It is an amenable number.

18861248 is an abundant number, since it is smaller than the sum of its proper divisors (23914384).

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

18861248 is an equidigital number, since it uses as much as digits as its factorization.

18861248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42120 (or 42110 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 18861248 is about 4342.9538335101. The cubic root of 18861248 is about 266.1890227497.

The spelling of 18861248 in words is "eighteen million, eight hundred sixty-one thousand, two hundred forty-eight".