18149428 has 12 divisors (see below), whose sum is σ = 34648992. Its totient is φ = 8249720.

The previous prime is 18149407. The next prime is 18149437. The reversal of 18149428 is 82494181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206200 + ... + 206287.

It is an arithmetic number, because the mean of its divisors is an integer number (2887416).

Almost surely, 2^18149428 is an apocalyptic number.

It is an amenable number.

18149428 is a deficient number, since it is larger than the sum of its proper divisors (16499564).

18149428 is a wasteful number, since it uses less digits than its factorization.

18149428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412502 (or 412500 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 18149428 is about 4260.2145485879. The cubic root of 18149428 is about 262.7973495173.

The spelling of 18149428 in words is "eighteen million, one hundred forty-nine thousand, four hundred twenty-eight".