18858072 has 16 divisors (see below), whose sum is σ = 47145240. Its totient is φ = 6286016.

The previous prime is 18858053. The next prime is 18858113. The reversal of 18858072 is 27085881.

It is a self number, because there is not a number n which added to its sum of digits gives 18858072.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 392853 + ... + 392900.

Almost surely, 2^18858072 is an apocalyptic number.

18858072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18858072 is an abundant number, since it is smaller than the sum of its proper divisors (28287168).

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

18858072 is a wasteful number, since it uses less digits than its factorization.

18858072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785762 (or 785758 counting only the distinct ones).

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

The square root of 18858072 is about 4342.5881683623. The cubic root of 18858072 is about 266.1740809354.

The spelling of 18858072 in words is "eighteen million, eight hundred fifty-eight thousand, seventy-two".