3782978841 has 4 divisors (see below), whose sum is σ = 5043971792. Its totient is φ = 2521985892.

The previous prime is 3782978819. The next prime is 3782978851. The reversal of 3782978841 is 1488792873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1488792873 = 3 ⋅496264291.

It is not a de Polignac number, because 3782978841 - 2⁶ = 3782978777 is a prime.

It is a super-2 number, since 2×3782978841² = 28621857822907406562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3782978851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630496471 + ... + 630496476.

It is an arithmetic number, because the mean of its divisors is an integer number (1260992948).

Almost surely, 2^3782978841 is an apocalyptic number.

It is an amenable number.

3782978841 is a deficient number, since it is larger than the sum of its proper divisors (1260992951).

3782978841 is a wasteful number, since it uses less digits than its factorization.

3782978841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260992950.

The product of its digits is 5419008, while the sum is 57.

The square root of 3782978841 is about 61505.9252511496. The cubic root of 3782978841 is about 1558.1573192590.

The spelling of 3782978841 in words is "three billion, seven hundred eighty-two million, nine hundred seventy-eight thousand, eight hundred forty-one".