1838172285 has 48 divisors (see below), whose sum is σ = 3309546240. Its totient is φ = 978765120.

The previous prime is 1838172257. The next prime is 1838172289. The reversal of 1838172285 is 5822718381.

It is not a de Polignac number, because 1838172285 - 2¹⁰ = 1838171261 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1838172285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838172289) 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, 1492620 + ... + 1493850.

It is an arithmetic number, because the mean of its divisors is an integer number (68948880).

Almost surely, 2^1838172285 is an apocalyptic number.

1838172285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1838172285 is a deficient number, since it is larger than the sum of its proper divisors (1471373955).

1838172285 is a wasteful number, since it uses less digits than its factorization.

1838172285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2468 counting only the distinct ones).

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

The square root of 1838172285 is about 42873.9114730625. The cubic root of 1838172285 is about 1224.9792660658.

The spelling of 1838172285 in words is "one billion, eight hundred thirty-eight million, one hundred seventy-two thousand, two hundred eighty-five".