1868257944 has 48 divisors (see below), whose sum is σ = 5782704720. Its totient is φ = 533787840.

The previous prime is 1868257931. The next prime is 1868257957. The reversal of 1868257944 is 4497528681.

It is a happy number.

1868257944 is a `hidden beast` number, since 1 + 8 + 68 + 2 + 579 + 4 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1868257931) and next prime (1868257957).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1852927 + ... + 1853934.

It is an arithmetic number, because the mean of its divisors is an integer number (120473015).

Almost surely, 2^1868257944 is an apocalyptic number.

1868257944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1868257944 is an abundant number, since it is smaller than the sum of its proper divisors (3914446776).

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

1868257944 is a wasteful number, since it uses less digits than its factorization.

1868257944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706880 (or 3706873 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 1868257944 is about 43223.3495231455. The cubic root of 1868257944 is about 1231.6262763522.

The spelling of 1868257944 in words is "one billion, eight hundred sixty-eight million, two hundred fifty-seven thousand, nine hundred forty-four".