2638086421 has 32 divisors (see below), whose sum is σ = 2846412800. Its totient is φ = 2441275200.

The previous prime is 2638086397. The next prime is 2638086433. The reversal of 2638086421 is 1246808362.

It is a cyclic number.

It is not a de Polignac number, because 2638086421 - 2⁵ = 2638086389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638086481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17470696 + ... + 17470846.

It is an arithmetic number, because the mean of its divisors is an integer number (88950400).

Almost surely, 2^2638086421 is an apocalyptic number.

It is an amenable number.

2638086421 is a deficient number, since it is larger than the sum of its proper divisors (208326379).

2638086421 is a wasteful number, since it uses less digits than its factorization.

2638086421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 2638086421 is about 51362.3054486459. The cubic root of 2638086421 is about 1381.7506349651.

The spelling of 2638086421 in words is "two billion, six hundred thirty-eight million, eighty-six thousand, four hundred twenty-one".