28069676840 has 32 divisors (see below), whose sum is σ = 63197685000. Its totient is φ = 11220597504.

The previous prime is 28069676827. The next prime is 28069676891. The reversal of 28069676840 is 4867696082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27283771684 + 785905156 = 165178^2 + 28034^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164555 + ... + 288474.

Almost surely, 2^28069676840 is an apocalyptic number.

28069676840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28069676840 is an abundant number, since it is smaller than the sum of its proper divisors (35128008160).

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

28069676840 is a wasteful number, since it uses less digits than its factorization.

28069676840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454589 (or 454585 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 28069676840 in words is "twenty-eight billion, sixty-nine million, six hundred seventy-six thousand, eight hundred forty".