28641415540 has 24 divisors (see below), whose sum is σ = 61426697472. Its totient is φ = 11212809120.

The previous prime is 28641415531. The next prime is 28641415541. The reversal of 28641415540 is 4551414682.

It is a junction number, because it is equal to n+sod(n) for n = 28641415493 and 28641415502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28641415541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15233856 + ... + 15235735.

It is an arithmetic number, because the mean of its divisors is an integer number (2559445728).

Almost surely, 2^28641415540 is an apocalyptic number.

28641415540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28641415540 is an abundant number, since it is smaller than the sum of its proper divisors (32785281932).

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

28641415540 is a wasteful number, since it uses less digits than its factorization.

28641415540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30469647 (or 30469645 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 28641415540 in words is "twenty-eight billion, six hundred forty-one million, four hundred fifteen thousand, five hundred forty".