7638428450 has 48 divisors (see below), whose sum is σ = 14993281440. Its totient is φ = 2887200000.

The previous prime is 7638428449. The next prime is 7638428459. The reversal of 7638428450 is 548248367.

It is a junction number, because it is equal to n+sod(n) for n = 7638428395 and 7638428404.

It is not an unprimeable number, because it can be changed into a prime (7638428459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370925 + ... + 390975.

It is an arithmetic number, because the mean of its divisors is an integer number (312360030).

Almost surely, 2^7638428450 is an apocalyptic number.

7638428450 is a deficient number, since it is larger than the sum of its proper divisors (7354852990).

7638428450 is a wasteful number, since it uses less digits than its factorization.

7638428450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20483 (or 20478 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The square root of 7638428450 is about 87398.1032402878. The cubic root of 7638428450 is about 1969.4033468424.

The spelling of 7638428450 in words is "seven billion, six hundred thirty-eight million, four hundred twenty-eight thousand, four hundred fifty".