18799740 has 144 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 4523904.

The previous prime is 18799727. The next prime is 18799741. The reversal of 18799740 is 4799781.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18799741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78541 + ... + 78779.

It is an arithmetic number, because the mean of its divisors is an integer number (436800).

Almost surely, 2^18799740 is an apocalyptic number.

18799740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18799740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31449600).

18799740 is an abundant number, since it is smaller than the sum of its proper divisors (44099460).

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

18799740 is a wasteful number, since it uses less digits than its factorization.

18799740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 18799740 is about 4335.8666953678. The cubic root of 18799740 is about 265.8993532585.

The spelling of 18799740 in words is "eighteen million, seven hundred ninety-nine thousand, seven hundred forty".