28333478340 has 36 divisors (see below), whose sum is σ = 85944884844. Its totient is φ = 7555594176.

The previous prime is 28333478339. The next prime is 28333478353. The reversal of 28333478340 is 4387433382.

28333478340 is a `hidden beast` number, since 283 + 334 + 7 + 8 + 34 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18890303364 + 9443174976 = 137442^2 + 97176^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78703927 + ... + 78704286.

Almost surely, 2^28333478340 is an apocalyptic number.

28333478340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28333478340 is an abundant number, since it is smaller than the sum of its proper divisors (57611406504).

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

28333478340 is a wasteful number, since it uses less digits than its factorization.

28333478340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157408228 (or 157408223 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 28333478340 in words is "twenty-eight billion, three hundred thirty-three million, four hundred seventy-eight thousand, three hundred forty".