1868145492 has 24 divisors (see below), whose sum is σ = 4460379616. Its totient is φ = 608233248.

The previous prime is 1868145479. The next prime is 1868145527. The reversal of 1868145492 is 2945418681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809703 + ... + 1810734.

Almost surely, 2^1868145492 is an apocalyptic number.

1868145492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1868145492 is an abundant number, since it is smaller than the sum of its proper divisors (2592234124).

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

1868145492 is a wasteful number, since it uses less digits than its factorization.

1868145492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620487 (or 3620485 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 1868145492 is about 43222.0486788861. The cubic root of 1868145492 is about 1231.6015649864.

The spelling of 1868145492 in words is "one billion, eight hundred sixty-eight million, one hundred forty-five thousand, four hundred ninety-two".