18840276 has 168 divisors, whose sum is σ = 61697664. Its totient is φ = 4898880.

The previous prime is 18840271. The next prime is 18840307. The reversal of 18840276 is 67204881.

18840276 is a `hidden beast` number, since 188 + 402 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18840276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840271) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 265321 + ... + 265391.

It is an arithmetic number, because the mean of its divisors is an integer number (367248).

Almost surely, 2^18840276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18840276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30848832).

18840276 is an abundant number, since it is smaller than the sum of its proper divisors (42857388).

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

18840276 is a wasteful number, since it uses less digits than its factorization.

18840276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 18840276 is about 4340.5386762475. The cubic root of 18840276 is about 266.0903267965.

The spelling of 18840276 in words is "eighteen million, eight hundred forty thousand, two hundred seventy-six".