7478449408 has 18 divisors (see below), whose sum is σ = 14927686634. Its totient is φ = 3739224576.

The previous prime is 7478449403. The next prime is 7478449409. The reversal of 7478449408 is 8049448747.

It can be written as a sum of positive squares in only one way, i.e., 6771314944 + 707134464 = 82288^2 + 26592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7478449403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14606091 + ... + 14606602.

Almost surely, 2^7478449408 is an apocalyptic number.

It is an amenable number.

7478449408 is a deficient number, since it is larger than the sum of its proper divisors (7449237226).

7478449408 is an equidigital number, since it uses as much as digits as its factorization.

7478449408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29212709 (or 29212695 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 55.

The square root of 7478449408 is about 86478.0284696639. The cubic root of 7478449408 is about 1955.5571838676.

The spelling of 7478449408 in words is "seven billion, four hundred seventy-eight million, four hundred forty-nine thousand, four hundred eight".