2891492040 has 128 divisors (see below), whose sum is σ = 8919072000. Its totient is φ = 749629440.

The previous prime is 2891492033. The next prime is 2891492041. The reversal of 2891492040 is 402941982.

It is a self number, because there is not a number n which added to its sum of digits gives 2891492040.

It is not an unprimeable number, because it can be changed into a prime (2891492041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 619636 + ... + 624284.

It is an arithmetic number, because the mean of its divisors is an integer number (69680250).

Almost surely, 2^2891492040 is an apocalyptic number.

2891492040 is a gapful number since it is divisible by the number (20) 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 2891492040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459536000).

2891492040 is an abundant number, since it is smaller than the sum of its proper divisors (6027579960).

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

2891492040 is a wasteful number, since it uses less digits than its factorization.

2891492040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807 (or 4803 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2891492040 is about 53772.5956226775. The cubic root of 2891492040 is about 1424.6472158394.

The spelling of 2891492040 in words is "two billion, eight hundred ninety-one million, four hundred ninety-two thousand, forty".