18898656 has 48 divisors (see below), whose sum is σ = 56697984. Its totient is φ = 5399424.

The previous prime is 18898643. The next prime is 18898657. The reversal of 18898656 is 65689881.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 18898599 and 18898608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18898657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13390 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (1181208).

Almost surely, 2^18898656 is an apocalyptic number.

18898656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18898656 is an abundant number, since it is smaller than the sum of its proper divisors (37799328).

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

18898656 is a wasteful number, since it uses less digits than its factorization.

18898656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28143 (or 28135 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 18898656 is about 4347.2584464234. The cubic root of 18898656 is about 266.3648863891.

The spelling of 18898656 in words is "eighteen million, eight hundred ninety-eight thousand, six hundred fifty-six".