2478268309 has 16 divisors (see below), whose sum is σ = 2800958976. Its totient is φ = 2172340800.

The previous prime is 2478268307. The next prime is 2478268333. The reversal of 2478268309 is 9038628742.

It is a cyclic number.

It is not a de Polignac number, because 2478268309 - 2¹ = 2478268307 is a prime.

It is a super-2 number, since 2×2478268309² = 12283627622787438962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478268301) 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, 81339 + ... + 107575.

It is an arithmetic number, because the mean of its divisors is an integer number (175059936).

Almost surely, 2^2478268309 is an apocalyptic number.

It is an amenable number.

2478268309 is a deficient number, since it is larger than the sum of its proper divisors (322690667).

2478268309 is a wasteful number, since it uses less digits than its factorization.

2478268309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26556.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 2478268309 is about 49782.2087597567. The cubic root of 2478268309 is about 1353.2647657040.

The spelling of 2478268309 in words is "two billion, four hundred seventy-eight million, two hundred sixty-eight thousand, three hundred nine".