28478510742 has 32 divisors (see below), whose sum is σ = 62715648384. Its totient is φ = 8549196800.

The previous prime is 28478510713. The next prime is 28478510773. The reversal of 28478510742 is 24701587482.

It is a super-2 number, since 2×28478510742² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28478510691 and 28478510700.

It is a congruent number.

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, 2009259 + ... + 2023382.

It is an arithmetic number, because the mean of its divisors is an integer number (1959864012).

Almost surely, 2^28478510742 is an apocalyptic number.

28478510742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28478510742 is an abundant number, since it is smaller than the sum of its proper divisors (34237137642).

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

28478510742 is a wasteful number, since it uses less digits than its factorization.

28478510742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032764.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 28478510742 in words is "twenty-eight billion, four hundred seventy-eight million, five hundred ten thousand, seven hundred forty-two".