2656867398 has 16 divisors (see below), whose sum is σ = 5316103920. Its totient is φ = 885227616.

The previous prime is 2656867361. The next prime is 2656867487. The reversal of 2656867398 is 8937686562.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83965 + ... + 111192.

It is an arithmetic number, because the mean of its divisors is an integer number (332256495).

Almost surely, 2^2656867398 is an apocalyptic number.

2656867398 is an abundant number, since it is smaller than the sum of its proper divisors (2659236522).

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

2656867398 is a wasteful number, since it uses less digits than its factorization.

2656867398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197431.

The product of its digits is 26127360, while the sum is 60.

The square root of 2656867398 is about 51544.8096126079. The cubic root of 2656867398 is about 1385.0218554506.

The spelling of 2656867398 in words is "two billion, six hundred fifty-six million, eight hundred sixty-seven thousand, three hundred ninety-eight".