28084622668240 has 40 divisors (see below), whose sum is σ = 65319571286568. Its totient is φ = 11229922429440.

The previous prime is 28084622668229. The next prime is 28084622668247. The reversal of 28084622668240 is 4286622648082.

It can be written as a sum of positive squares in 4 ways, for example, as 275368859536 + 27809253808704 = 524756^2 + 5273448^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084622668247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61123407 + ... + 61581166.

Almost surely, 2^{28084622668240} is an apocalyptic number.

28084622668240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28084622668240 is an abundant number, since it is smaller than the sum of its proper divisors (37234948618328).

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

28084622668240 is a wasteful number, since it uses less digits than its factorization.

28084622668240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122707447 (or 122707441 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 58.

The spelling of 28084622668240 in words is "twenty-eight trillion, eighty-four billion, six hundred twenty-two million, six hundred sixty-eight thousand, two hundred forty".