18400748 has 6 divisors (see below), whose sum is σ = 32201316. Its totient is φ = 9200372.

The previous prime is 18400747. The next prime is 18400751. The reversal of 18400748 is 84700481.

It is not an unprimeable number, because it can be changed into a prime (18400741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300090 + ... + 2300097.

It is an arithmetic number, because the mean of its divisors is an integer number (5366886).

Almost surely, 2^18400748 is an apocalyptic number.

It is an amenable number.

18400748 is a deficient number, since it is larger than the sum of its proper divisors (13800568).

18400748 is a wasteful number, since it uses less digits than its factorization.

18400748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600191 (or 4600189 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18400748 is about 4289.6093062189. The cubic root of 18400748 is about 264.0048017186.

The spelling of 18400748 in words is "eighteen million, four hundred thousand, seven hundred forty-eight".