2638898363 has 4 divisors (see below), whose sum is σ = 2643003048. Its totient is φ = 2634793680.

The previous prime is 2638898351. The next prime is 2638898401. The reversal of 2638898363 is 3638988362.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3638988362 = 2 ⋅1819494181.

It is a cyclic number.

It is not a de Polignac number, because 2638898363 - 2⁶ = 2638898299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2638898299 and 2638898308.

It is not an unprimeable number, because it can be changed into a prime (2638808363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051378 + ... + 2052663.

It is an arithmetic number, because the mean of its divisors is an integer number (660750762).

Almost surely, 2^2638898363 is an apocalyptic number.

2638898363 is a deficient number, since it is larger than the sum of its proper divisors (4104685).

2638898363 is an equidigital number, since it uses as much as digits as its factorization.

2638898363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104684.

The product of its digits is 8957952, while the sum is 56.

The square root of 2638898363 is about 51370.2089055515. The cubic root of 2638898363 is about 1381.8923773895.

The spelling of 2638898363 in words is "two billion, six hundred thirty-eight million, eight hundred ninety-eight thousand, three hundred sixty-three".