3945492544 has 84 divisors (see below), whose sum is σ = 9134720364. Its totient is φ = 1685892096.

The previous prime is 3945492491. The next prime is 3945492569. The reversal of 3945492544 is 4452945493.

It can be written as a sum of positive squares in 2 ways, for example, as 3281914944 + 663577600 = 57288^2 + 25760^2 .

It is a super-2 number, since 2×3945492544² = 31133822829519183872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1168042 + ... + 1171414.

It is an arithmetic number, because the mean of its divisors is an integer number (108746671).

Almost surely, 2^3945492544 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 3945492544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4567360182).

3945492544 is an abundant number, since it is smaller than the sum of its proper divisors (5189227820).

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

3945492544 is a wasteful number, since it uses less digits than its factorization.

3945492544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772 (or 3755 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 49.

The square root of 3945492544 is about 62813.1558194619. The cubic root of 3945492544 is about 1580.1576171339.

The spelling of 3945492544 in words is "three billion, nine hundred forty-five million, four hundred ninety-two thousand, five hundred forty-four".