28921226290 has 16 divisors (see below), whose sum is σ = 56790771840. Its totient is φ = 10516809520.

The previous prime is 28921226287. The next prime is 28921226291. The reversal of 28921226290 is 9262212982.

It is not an unprimeable number, because it can be changed into a prime (28921226291) 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, 131460010 + ... + 131460229.

It is an arithmetic number, because the mean of its divisors is an integer number (3549423240).

Almost surely, 2^28921226290 is an apocalyptic number.

28921226290 is a deficient number, since it is larger than the sum of its proper divisors (27869545550).

28921226290 is a wasteful number, since it uses less digits than its factorization.

28921226290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262920257.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 28921226290 in words is "twenty-eight billion, nine hundred twenty-one million, two hundred twenty-six thousand, two hundred ninety".