2478985387 has 4 divisors (see below), whose sum is σ = 2491442800. Its totient is φ = 2466527976.

The previous prime is 2478985361. The next prime is 2478985403. The reversal of 2478985387 is 7835898742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2478985387 - 2⁷ = 2478985259 is a prime.

It is a super-2 number, since 2×2478985387² = 12290737097919079538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478925387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6228408 + ... + 6228805.

It is an arithmetic number, because the mean of its divisors is an integer number (622860700).

Almost surely, 2^2478985387 is an apocalyptic number.

2478985387 is a deficient number, since it is larger than the sum of its proper divisors (12457413).

2478985387 is a wasteful number, since it uses less digits than its factorization.

2478985387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12457412.

The product of its digits is 27095040, while the sum is 61.

The square root of 2478985387 is about 49789.4103901623. The cubic root of 2478985387 is about 1353.3952738778.

The spelling of 2478985387 in words is "two billion, four hundred seventy-eight million, nine hundred eighty-five thousand, three hundred eighty-seven".