18828765 has 24 divisors (see below), whose sum is σ = 32786208. Its totient is φ = 9996000.

The previous prime is 18828763. The next prime is 18828773. The reversal of 18828765 is 56782881.

18828765 = T₂₅₅ + T₂₅₆ + ... + T₅₀₅.

It is not a de Polignac number, because 18828765 - 2¹ = 18828763 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18828765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18828763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10462 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (1366092).

Almost surely, 2^18828765 is an apocalyptic number.

18828765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18828765 is a deficient number, since it is larger than the sum of its proper divisors (13957443).

18828765 is a wasteful number, since it uses less digits than its factorization.

18828765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1926 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 18828765 is about 4339.2124861546. The cubic root of 18828765 is about 266.0361239500.

It can be divided in two parts, 1882876 and 5, that added together give a palindrome (1882881).

The spelling of 18828765 in words is "eighteen million, eight hundred twenty-eight thousand, seven hundred sixty-five".