8213653438 has 4 divisors (see below), whose sum is σ = 12320480160. Its totient is φ = 4106826718.

The previous prime is 8213653433. The next prime is 8213653439. The reversal of 8213653438 is 8343563128.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 8213653394 and 8213653403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213653433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2053413358 + ... + 2053413361.

It is an arithmetic number, because the mean of its divisors is an integer number (3080120040).

Almost surely, 2^8213653438 is an apocalyptic number.

8213653438 is a deficient number, since it is larger than the sum of its proper divisors (4106826722).

8213653438 is a wasteful number, since it uses less digits than its factorization.

8213653438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106826721.

The product of its digits is 414720, while the sum is 43.

The square root of 8213653438 is about 90629.2085257286. The cubic root of 8213653438 is about 2017.6482644845.

The spelling of 8213653438 in words is "eight billion, two hundred thirteen million, six hundred fifty-three thousand, four hundred thirty-eight".