3881779406 has 4 divisors (see below), whose sum is σ = 5822669112. Its totient is φ = 1940889702.

The previous prime is 3881779403. The next prime is 3881779417. The reversal of 3881779406 is 6049771883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6049771883 = 1291 ⋅4686113.

It is a super-2 number, since 2×3881779406² = 30136422713691425672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881779403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970444850 + ... + 970444853.

It is an arithmetic number, because the mean of its divisors is an integer number (1455667278).

Almost surely, 2^3881779406 is an apocalyptic number.

3881779406 is a deficient number, since it is larger than the sum of its proper divisors (1940889706).

3881779406 is a wasteful number, since it uses less digits than its factorization.

3881779406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940889705.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 3881779406 is about 62303.9276932041. The cubic root of 3881779406 is about 1571.6057794089.

The spelling of 3881779406 in words is "three billion, eight hundred eighty-one million, seven hundred seventy-nine thousand, four hundred six".