3921028799 has 4 divisors (see below), whose sum is σ = 4091508336. Its totient is φ = 3750549264.

The previous prime is 3921028693. The next prime is 3921028819. The reversal of 3921028799 is 9978201293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9978201293 = 5281 ⋅1889453.

It is a cyclic number.

It is not a de Polignac number, because 3921028799 - 2⁸ = 3921028543 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 (3921021799) 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, 85239734 + ... + 85239779.

It is an arithmetic number, because the mean of its divisors is an integer number (1022877084).

Almost surely, 2^3921028799 is an apocalyptic number.

3921028799 is a deficient number, since it is larger than the sum of its proper divisors (170479537).

3921028799 is a wasteful number, since it uses less digits than its factorization.

3921028799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170479536.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 3921028799 is about 62618.1187756387. The cubic root of 3921028799 is about 1576.8849589714.

The spelling of 3921028799 in words is "three billion, nine hundred twenty-one million, twenty-eight thousand, seven hundred ninety-nine".