18270828 has 18 divisors (see below), whose sum is σ = 46184684. Its totient is φ = 6090264.

The previous prime is 18270817. The next prime is 18270851. The reversal of 18270828 is 82807281.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 507523 = 18270828 / (1 + 8 + 2 + 7 + 0 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 18270792 and 18270801.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253726 + ... + 253797.

Almost surely, 2^18270828 is an apocalyptic number.

18270828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18270828 is an abundant number, since it is smaller than the sum of its proper divisors (27913856).

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

18270828 is a wasteful number, since it uses less digits than its factorization.

18270828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507533 (or 507528 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 18270828 is about 4274.4389105472. The cubic root of 18270828 is about 263.3819910443.

The spelling of 18270828 in words is "eighteen million, two hundred seventy thousand, eight hundred twenty-eight".