2400428257 has 8 divisors (see below), whose sum is σ = 2407000680. Its totient is φ = 2393865600.

The previous prime is 2400428249. The next prime is 2400428269. The reversal of 2400428257 is 7528240042.

It can be written as a sum of positive squares in 4 ways, for example, as 1953993616 + 446434641 = 44204^2 + 21129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2400428257 - 2³ = 2400428249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2400428857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823719 + ... + 826627.

It is an arithmetic number, because the mean of its divisors is an integer number (300875085).

Almost surely, 2^2400428257 is an apocalyptic number.

It is an amenable number.

2400428257 is a deficient number, since it is larger than the sum of its proper divisors (6572423).

2400428257 is a wasteful number, since it uses less digits than its factorization.

2400428257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883.

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 2400428257 is about 48994.1655403988. The cubic root of 2400428257 is about 1338.9455313577.

Adding to 2400428257 its reverse (7528240042), we get a palindrome (9928668299).

The spelling of 2400428257 in words is "two billion, four hundred million, four hundred twenty-eight thousand, two hundred fifty-seven".