1866253268 has 24 divisors (see below), whose sum is σ = 3772427904. Its totient is φ = 798396800.

The previous prime is 1866253267. The next prime is 1866253297. The reversal of 1866253268 is 8623526681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866253267) 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, 1246748 + ... + 1248243.

It is an arithmetic number, because the mean of its divisors is an integer number (157184496).

Almost surely, 2^1866253268 is an apocalyptic number.

It is an amenable number.

1866253268 is an abundant number, since it is smaller than the sum of its proper divisors (1906174636).

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

1866253268 is a wasteful number, since it uses less digits than its factorization.

1866253268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495023 (or 2495021 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 1866253268 is about 43200.1535645419. The cubic root of 1866253268 is about 1231.1855992907.

The spelling of 1866253268 in words is "one billion, eight hundred sixty-six million, two hundred fifty-three thousand, two hundred sixty-eight".