28148435478 has 12 divisors (see below), whose sum is σ = 60988276908. Its totient is φ = 9382811820.

The previous prime is 28148435473. The next prime is 28148435489. The reversal of 28148435478 is 87453484182.

28148435478 is a `hidden beast` number, since 2 + 8 + 14 + 84 + 3 + 547 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28148435473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781900968 + ... + 781901003.

It is an arithmetic number, because the mean of its divisors is an integer number (5082356409).

Almost surely, 2^28148435478 is an apocalyptic number.

28148435478 is an abundant number, since it is smaller than the sum of its proper divisors (32839841430).

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

28148435478 is a wasteful number, since it uses less digits than its factorization.

28148435478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563801979 (or 1563801976 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 54.

The spelling of 28148435478 in words is "twenty-eight billion, one hundred forty-eight million, four hundred thirty-five thousand, four hundred seventy-eight".