1945830636 has 72 divisors (see below), whose sum is σ = 5140122624. Its totient is φ = 619486560.

The previous prime is 1945830617. The next prime is 1945830637. The reversal of 1945830636 is 6360385491.

1945830636 is a `hidden beast` number, since 1 + 9 + 4 + 5 + 8 + 3 + 0 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1945830591 and 1945830600.

It is not an unprimeable number, because it can be changed into a prime (1945830637) 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, 749701 + ... + 752291.

It is an arithmetic number, because the mean of its divisors is an integer number (71390592).

Almost surely, 2^1945830636 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 1945830636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2570061312).

1945830636 is an abundant number, since it is smaller than the sum of its proper divisors (3194291988).

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

1945830636 is a wasteful number, since it uses less digits than its factorization.

1945830636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531 (or 3526 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 1945830636 is about 44111.5703189084. The cubic root of 1945830636 is about 1248.4419277489.

The spelling of 1945830636 in words is "one billion, nine hundred forty-five million, eight hundred thirty thousand, six hundred thirty-six".