18270072 has 24 divisors (see below), whose sum is σ = 49481640. Its totient is φ = 6090000.

The previous prime is 18270061. The next prime is 18270079. The reversal of 18270072 is 27007281.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18270079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126804 + ... + 126947.

It is an arithmetic number, because the mean of its divisors is an integer number (2061735).

Almost surely, 2^18270072 is an apocalyptic number.

18270072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18270072 is an abundant number, since it is smaller than the sum of its proper divisors (31211568).

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

18270072 is a wasteful number, since it uses less digits than its factorization.

18270072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253763 (or 253756 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 18270072 is about 4274.3504769731. The cubic root of 18270072 is about 263.3783583038.

The spelling of 18270072 in words is "eighteen million, two hundred seventy thousand, seventy-two".