1862141985 has 48 divisors (see below), whose sum is σ = 3674256768. Its totient is φ = 863596800.

The previous prime is 1862141969. The next prime is 1862142043. The reversal of 1862141985 is 5891412681.

It is a happy number.

1862141985 is a `hidden beast` number, since 1 + 8 + 621 + 4 + 19 + 8 + 5 = 666.

It is not a de Polignac number, because 1862141985 - 2⁴ = 1862141969 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 1862141985.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70396 + ... + 93165.

It is an arithmetic number, because the mean of its divisors is an integer number (76547016).

Almost surely, 2^1862141985 is an apocalyptic number.

1862141985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1862141985 is a deficient number, since it is larger than the sum of its proper divisors (1812114783).

1862141985 is a wasteful number, since it uses less digits than its factorization.

1862141985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163606 (or 163603 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 1862141985 is about 43152.5432043118. The cubic root of 1862141985 is about 1230.2808500061.

It can be divided in two parts, 18621 and 41985, that added together give a palindrome (60606).

The spelling of 1862141985 in words is "one billion, eight hundred sixty-two million, one hundred forty-one thousand, nine hundred eighty-five".