1868423634 has 96 divisors (see below), whose sum is σ = 5312885760. Its totient is φ = 459756000.

The previous prime is 1868423617. The next prime is 1868423639. The reversal of 1868423634 is 4363248681.

1868423634 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 4 + 2 + 3 + 634 = 666.

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 1868423634.

It is not an unprimeable number, because it can be changed into a prime (1868423639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9142 + ... + 61809.

It is an arithmetic number, because the mean of its divisors is an integer number (55342560).

Almost surely, 2^1868423634 is an apocalyptic number.

1868423634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868423634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2656442880).

1868423634 is an abundant number, since it is smaller than the sum of its proper divisors (3444462126).

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

1868423634 is a wasteful number, since it uses less digits than its factorization.

1868423634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70996 (or 70993 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 1868423634 is about 43225.2661530268. The cubic root of 1868423634 is about 1231.6626849802.

The spelling of 1868423634 in words is "one billion, eight hundred sixty-eight million, four hundred twenty-three thousand, six hundred thirty-four".