7478730820 has 48 divisors (see below), whose sum is σ = 17596168128. Its totient is φ = 2646034560.

The previous prime is 7478730799. The next prime is 7478730823. The reversal of 7478730820 is 280378747.

It is not an unprimeable number, because it can be changed into a prime (7478730823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451242 + ... + 467521.

It is an arithmetic number, because the mean of its divisors is an integer number (366586836).

Almost surely, 2^7478730820 is an apocalyptic number.

It is an amenable number.

7478730820 is an abundant number, since it is smaller than the sum of its proper divisors (10117437308).

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

7478730820 is a wasteful number, since it uses less digits than its factorization.

7478730820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918820 (or 918818 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 46.

The square root of 7478730820 is about 86479.6555266035. The cubic root of 7478730820 is about 1955.5817125868.

The spelling of 7478730820 in words is "seven billion, four hundred seventy-eight million, seven hundred thirty thousand, eight hundred twenty".