7388478440 has 64 divisors (see below), whose sum is σ = 19440812160. Its totient is φ = 2474277120.

The previous prime is 7388478337. The next prime is 7388478473. The reversal of 7388478440 is 448748837.

It is a super-2 number, since 2×7388478440² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294791 + ... + 318870.

It is an arithmetic number, because the mean of its divisors is an integer number (303762690).

Almost surely, 2^7388478440 is an apocalyptic number.

7388478440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7388478440 is an abundant number, since it is smaller than the sum of its proper divisors (12052333720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7388478440 is a wasteful number, since it uses less digits than its factorization.

7388478440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613722 (or 613718 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 53.

The square root of 7388478440 is about 85956.2588762447. The cubic root of 7388478440 is about 1947.6832833183.

The spelling of 7388478440 in words is "seven billion, three hundred eighty-eight million, four hundred seventy-eight thousand, four hundred forty".