2490978644 has 48 divisors (see below), whose sum is σ = 5458750080. Its totient is φ = 966245760.

The previous prime is 2490978631. The next prime is 2490978647. The reversal of 2490978644 is 4468790942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490978647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52874 + ... + 88190.

It is an arithmetic number, because the mean of its divisors is an integer number (113723960).

Almost surely, 2^2490978644 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 2490978644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2729375040).

2490978644 is an abundant number, since it is smaller than the sum of its proper divisors (2967771436).

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

2490978644 is a wasteful number, since it uses less digits than its factorization.

2490978644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35568 (or 35566 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The square root of 2490978644 is about 49909.7049079635. The cubic root of 2490978644 is about 1355.5743255078.

The spelling of 2490978644 in words is "two billion, four hundred ninety million, nine hundred seventy-eight thousand, six hundred forty-four".