28128962340 has 60 divisors (see below), whose sum is σ = 88241601756. Its totient is φ = 7501056192.

The previous prime is 28128962333. The next prime is 28128962377. The reversal of 28128962340 is 4326982182.

28128962340 is a `hidden beast` number, since 2 + 8 + 12 + 8 + 9 + 623 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10630434816 + 17498527524 = 103104^2 + 132282^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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 19 ways as a sum of consecutive naturals, for example, 8680159 + ... + 8683398.

Almost surely, 2^28128962340 is an apocalyptic number.

28128962340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28128962340 is an abundant number, since it is smaller than the sum of its proper divisors (60112639416).

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

28128962340 is a wasteful number, since it uses less digits than its factorization.

28128962340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17363578 (or 17363567 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 28128962340 in words is "twenty-eight billion, one hundred twenty-eight million, nine hundred sixty-two thousand, three hundred forty".