2491066400 has 36 divisors (see below), whose sum is σ = 6081317802. Its totient is φ = 996426240.

The previous prime is 2491066393. The next prime is 2491066427. The reversal of 2491066400 is 46601942.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1121178256 + 1369888144 = 33484^2 + 37012^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1556117 + ... + 1557716.

Almost surely, 2^2491066400 is an apocalyptic number.

2491066400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491066400 is an abundant number, since it is smaller than the sum of its proper divisors (3590251402).

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

2491066400 is a wasteful number, since it uses less digits than its factorization.

2491066400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113853 (or 3113840 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2491066400 is about 49910.5840478751. The cubic root of 2491066400 is about 1355.5902440684.

The spelling of 2491066400 in words is "two billion, four hundred ninety-one million, sixty-six thousand, four hundred".