1001874636 has 144 divisors (see below), whose sum is σ = 3133831680. Its totient is φ = 271110240.

The previous prime is 1001874623. The next prime is 1001874661. The reversal of 1001874636 is 6364781001.

1001874636 is a `hidden beast` number, since 1 + 0 + 0 + 18 + 7 + 4 + 636 = 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 1001874636.

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, 271081 + ... + 274751.

It is an arithmetic number, because the mean of its divisors is an integer number (21762720).

Almost surely, 2^1001874636 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 1001874636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566915840).

1001874636 is an abundant number, since it is smaller than the sum of its proper divisors (2131957044).

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

1001874636 is a wasteful number, since it uses less digits than its factorization.

1001874636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3702 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1001874636 is about 31652.4033210750. The cubic root of 1001874636 is about 1000.6244885995.

The spelling of 1001874636 in words is "one billion, one million, eight hundred seventy-four thousand, six hundred thirty-six".