7449221638 has 8 divisors (see below), whose sum is σ = 11175345000. Its totient is φ = 3724106640.

The previous prime is 7449221629. The next prime is 7449221651. The reversal of 7449221638 is 8361229447.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233343 + ... + 263338.

It is an arithmetic number, because the mean of its divisors is an integer number (1396918125).

Almost surely, 2^7449221638 is an apocalyptic number.

7449221638 is a deficient number, since it is larger than the sum of its proper divisors (3726123362).

7449221638 is a wasteful number, since it uses less digits than its factorization.

7449221638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504182.

The product of its digits is 580608, while the sum is 46.

The square root of 7449221638 is about 86308.8734603807. The cubic root of 7449221638 is about 1953.0062451368.

The spelling of 7449221638 in words is "seven billion, four hundred forty-nine million, two hundred twenty-one thousand, six hundred thirty-eight".