28828228476340 has 12 divisors (see below), whose sum is σ = 60539279800356. Its totient is φ = 11531291390528.

The previous prime is 28828228476287. The next prime is 28828228476343. The reversal of 28828228476340 is 4367482282882.

It can be written as a sum of positive squares in 2 ways, for example, as 5685163072164 + 23143065404176 = 2384358^2 + 4810724^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28828228476343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720705711889 + ... + 720705711928.

It is an arithmetic number, because the mean of its divisors is an integer number (5044939983363).

Almost surely, 2^{28828228476340} is an apocalyptic number.

28828228476340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28828228476340 is an abundant number, since it is smaller than the sum of its proper divisors (31711051324016).

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

28828228476340 is a wasteful number, since it uses less digits than its factorization.

28828228476340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441411423826 (or 1441411423824 counting only the distinct ones).

The product of its (nonzero) digits is 132120576, while the sum is 64.

The spelling of 28828228476340 in words is "twenty-eight trillion, eight hundred twenty-eight billion, two hundred twenty-eight million, four hundred seventy-six thousand, three hundred forty".