2991384928 has 288 divisors, whose sum is σ = 7722086400. Its totient is φ = 1132185600.

The previous prime is 2991384919. The next prime is 2991384931. The reversal of 2991384928 is 8294831992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37865593 + ... + 37865671.

It is an arithmetic number, because the mean of its divisors is an integer number (26812800).

Almost surely, 2^2991384928 is an apocalyptic number.

2991384928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2991384928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3861043200).

2991384928 is an abundant number, since it is smaller than the sum of its proper divisors (4730701472).

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

2991384928 is a wasteful number, since it uses less digits than its factorization.

2991384928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 179 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 55.

The square root of 2991384928 is about 54693.5547208261. The cubic root of 2991384928 is about 1440.8676817999.

The spelling of 2991384928 in words is "two billion, nine hundred ninety-one million, three hundred eighty-four thousand, nine hundred twenty-eight".