28298001660 has 24 divisors (see below), whose sum is σ = 79234404816. Its totient is φ = 7546133760.

The previous prime is 28298001659. The next prime is 28298001679. The reversal of 28298001660 is 6610089282.

It is a congruent number.

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, 235816621 + ... + 235816740.

It is an arithmetic number, because the mean of its divisors is an integer number (3301433534).

Almost surely, 2^28298001660 is an apocalyptic number.

28298001660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28298001660 is an abundant number, since it is smaller than the sum of its proper divisors (50936403156).

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

28298001660 is a wasteful number, since it uses less digits than its factorization.

28298001660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471633373 (or 471633371 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 28298001660 in words is "twenty-eight billion, two hundred ninety-eight million, one thousand, six hundred sixty".