2491207744 has 63 divisors (see below), whose sum is σ = 5265737373. Its totient is φ = 1169138688.

The previous prime is 2491207687. The next prime is 2491207783. The reversal of 2491207744 is 4477021942.

It is a happy number.

The square root of 2491207744 is 49912.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1939521600 + 551686144 = 44040^2 + 23488^2 .

It is a super-2 number, since 2×2491207744² = 12412232047531139072, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2491207697 and 2491207706.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6787849 + ... + 6788215.

Almost surely, 2^2491207744 is an apocalyptic number.

2491207744 is the 49912-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491207744

2491207744 is an abundant number, since it is smaller than the sum of its proper divisors (2774529629).

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

2491207744 is an frugal number, since it uses more digits than its factorization.

2491207744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The cubic root of 2491207744 is about 1355.6158824755.

Multiplying 2491207744 by its product of nonzero digits (112896), we get a square (281247389466624 = 16770432²).

The spelling of 2491207744 in words is "two billion, four hundred ninety-one million, two hundred seven thousand, seven hundred forty-four".