18740448 has 36 divisors (see below), whose sum is σ = 53293968. Its totient is φ = 6246720.

The previous prime is 18740437. The next prime is 18740453. The reversal of 18740448 is 84404781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 5 ways as a sum of consecutive naturals, for example, 32248 + ... + 32823.

It is an arithmetic number, because the mean of its divisors is an integer number (1480388).

Almost surely, 2^18740448 is an apocalyptic number.

18740448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18740448 is an abundant number, since it is smaller than the sum of its proper divisors (34553520).

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

18740448 is a wasteful number, since it uses less digits than its factorization.

18740448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65087 (or 65076 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 18740448 is about 4329.0239084579. The cubic root of 18740448 is about 265.6195212342.

The spelling of 18740448 in words is "eighteen million, seven hundred forty thousand, four hundred forty-eight".