2478643836 has 12 divisors (see below), whose sum is σ = 5783502312. Its totient is φ = 826214608.

The previous prime is 2478643823. The next prime is 2478643901. The reversal of 2478643836 is 6383468742.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2478643836² = 12287350531481589792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103276815 + ... + 103276838.

It is an arithmetic number, because the mean of its divisors is an integer number (481958526).

Almost surely, 2^2478643836 is an apocalyptic number.

It is an amenable number.

2478643836 is an abundant number, since it is smaller than the sum of its proper divisors (3304858476).

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

2478643836 is a wasteful number, since it uses less digits than its factorization.

2478643836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206553660 (or 206553658 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 51.

The square root of 2478643836 is about 49785.9803157475. The cubic root of 2478643836 is about 1353.3331147457. Note that the first 3 decimals are identical.

The spelling of 2478643836 in words is "two billion, four hundred seventy-eight million, six hundred forty-three thousand, eight hundred thirty-six".