28358128890 has 128 divisors (see below), whose sum is σ = 93072913920. Its totient is φ = 5983248384.

The previous prime is 28358128837. The next prime is 28358128907. The reversal of 28358128890 is 9882185382.

28358128890 is a `hidden beast` number, since 2 + 8 + 358 + 1 + 288 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 552519 + ... + 601658.

It is an arithmetic number, because the mean of its divisors is an integer number (727132140).

Almost surely, 2^28358128890 is an apocalyptic number.

28358128890 is an abundant number, since it is smaller than the sum of its proper divisors (64714785030).

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

28358128890 is a wasteful number, since it uses less digits than its factorization.

28358128890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154213 (or 1154207 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 28358128890 in words is "twenty-eight billion, three hundred fifty-eight million, one hundred twenty-eight thousand, eight hundred ninety".