2478790871 has 4 divisors (see below), whose sum is σ = 2479794072. Its totient is φ = 2477787672.

The previous prime is 2478790861. The next prime is 2478790877. The reversal of 2478790871 is 1780978742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1780978742 = 2 ⋅890489371.

It is a cyclic number.

It is not a de Polignac number, because 2478790871 - 2¹⁸ = 2478528727 is a prime.

It is a super-2 number, since 2×2478790871² = 12288808364305877282, 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 (2478790877) 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, 497885 + ... + 502838.

It is an arithmetic number, because the mean of its divisors is an integer number (619948518).

Almost surely, 2^2478790871 is an apocalyptic number.

2478790871 is a deficient number, since it is larger than the sum of its proper divisors (1003201).

2478790871 is a wasteful number, since it uses less digits than its factorization.

2478790871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003200.

The product of its (nonzero) digits is 1580544, while the sum is 53.

The square root of 2478790871 is about 49787.4569645809. The cubic root of 2478790871 is about 1353.3598744596.

The spelling of 2478790871 in words is "two billion, four hundred seventy-eight million, seven hundred ninety thousand, eight hundred seventy-one".