28900126512890 has 8 divisors (see below), whose sum is σ = 52020227723220. Its totient is φ = 11560050605152.

The previous prime is 28900126512877. The next prime is 28900126512911. The reversal of 28900126512890 is 9821562100982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26226289987921 + 2673836524969 = 5121161^2 + 1635187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28900126512890² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445006325635 + ... + 1445006325654.

Almost surely, 2^{28900126512890} is an apocalyptic number.

28900126512890 is a deficient number, since it is larger than the sum of its proper divisors (23120101210330).

28900126512890 is a wasteful number, since it uses less digits than its factorization.

28900126512890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890012651296.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 28900126512890 in words is "twenty-eight trillion, nine hundred billion, one hundred twenty-six million, five hundred twelve thousand, eight hundred ninety".