1998264 has 32 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 660192.

The previous prime is 1998257. The next prime is 1998277. The reversal of 1998264 is 4628991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3037 + ... + 3635.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1998264 is an apocalyptic number.

It is an amenable number.

1998264 is an abundant number, since it is smaller than the sum of its proper divisors (3041736).

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

1998264 is a wasteful number, since it uses less digits than its factorization.

1998264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 1998264 is about 1413.5996604414. The cubic root of 1998264 is about 125.9556407214.

The spelling of 1998264 in words is "one million, nine hundred ninety-eight thousand, two hundred sixty-four".