2247644638 has 4 divisors (see below), whose sum is σ = 3371466960. Its totient is φ = 1123822318.

The previous prime is 2247644629. The next prime is 2247644671. The reversal of 2247644638 is 8364467422.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561911158 + ... + 561911161.

It is an arithmetic number, because the mean of its divisors is an integer number (842866740).

Almost surely, 2^2247644638 is an apocalyptic number.

2247644638 is a deficient number, since it is larger than the sum of its proper divisors (1123822322).

2247644638 is a wasteful number, since it uses less digits than its factorization.

2247644638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123822321.

The product of its digits is 1548288, while the sum is 46.

The square root of 2247644638 is about 47409.3307060962. The cubic root of 2247644638 is about 1309.9132934085.

The spelling of 2247644638 in words is "two billion, two hundred forty-seven million, six hundred forty-four thousand, six hundred thirty-eight".