3891097280 has 112 divisors (see below), whose sum is σ = 10763317056. Its totient is φ = 1312174080.

The previous prime is 3891097271. The next prime is 3891097297. The reversal of 3891097280 is 827901983.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122402 + ... + 150878.

Almost surely, 2^3891097280 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 3891097280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5381658528).

3891097280 is an abundant number, since it is smaller than the sum of its proper divisors (6872219776).

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

3891097280 is a wasteful number, since it uses less digits than its factorization.

3891097280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28562 (or 28552 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 3891097280 is about 62378.6604537161. The cubic root of 3891097280 is about 1572.8622755897.

The spelling of 3891097280 in words is "three billion, eight hundred ninety-one million, ninety-seven thousand, two hundred eighty".