1858872 has 32 divisors (see below), whose sum is σ = 4715280. Its totient is φ = 610560.

The previous prime is 1858867. The next prime is 1858873. The reversal of 1858872 is 2788581.

It is a super-2 number, since 2×1858872² = 6910810224768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1858872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222 + ... + 2282.

2^1858872 is an apocalyptic number.

1858872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1858872 is an abundant number, since it is smaller than the sum of its proper divisors (2856408).

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

1858872 is a wasteful number, since it uses less digits than its factorization.

1858872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143 (or 1139 counting only the distinct ones).

The product of its digits is 35840, while the sum is 39.

The square root of 1858872 is about 1363.4045621165. The cubic root of 1858872 is about 122.9560289651.

The spelling of 1858872 in words is "one million, eight hundred fifty-eight thousand, eight hundred seventy-two".