3881780949 has 8 divisors (see below), whose sum is σ = 5176037152. Its totient is φ = 2587689360.

The previous prime is 3881780873. The next prime is 3881780977. The reversal of 3881780949 is 9490871883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3881780949 - 2¹⁹ = 3881256661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881780999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32919 + ... + 94059.

It is an arithmetic number, because the mean of its divisors is an integer number (647004644).

Almost surely, 2^3881780949 is an apocalyptic number.

It is an amenable number.

3881780949 is a deficient number, since it is larger than the sum of its proper divisors (1294256203).

3881780949 is a wasteful number, since it uses less digits than its factorization.

3881780949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82307.

The product of its (nonzero) digits is 3483648, while the sum is 57.

The square root of 3881780949 is about 62303.9400760498. The cubic root of 3881780949 is about 1571.6059876456.

The spelling of 3881780949 in words is "three billion, eight hundred eighty-one million, seven hundred eighty thousand, nine hundred forty-nine".