7815438480 has 40 divisors (see below), whose sum is σ = 24227860032. Its totient is φ = 2084116864.

The previous prime is 7815438461. The next prime is 7815438487. The reversal of 7815438480 is 848345187.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×7815438480² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (7815438487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16281924 + ... + 16282403.

Almost surely, 2^7815438480 is an apocalyptic number.

It is an amenable number.

7815438480 is an abundant number, since it is smaller than the sum of its proper divisors (16412421552).

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

7815438480 is a wasteful number, since it uses less digits than its factorization.

7815438480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32564343 (or 32564337 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 7815438480 is about 88404.9686386461. The cubic root of 7815438480 is about 1984.5000595761.

The spelling of 7815438480 in words is "seven billion, eight hundred fifteen million, four hundred thirty-eight thousand, four hundred eighty".