28890051 has 8 divisors (see below), whose sum is σ = 40547520. Its totient is φ = 18246312.

The previous prime is 28890031. The next prime is 28890053. The reversal of 28890051 is 15009882.

28890051 = T₂₂₈ + T₂₂₉ + ... + T₅₆₉.

It is a happy number.

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

It is not a de Polignac number, because 28890051 - 2¹⁰ = 28889027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28889994 and 28890021.

It is not an unprimeable number, because it can be changed into a prime (28890053) 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, 253365 + ... + 253478.

It is an arithmetic number, because the mean of its divisors is an integer number (5068440).

Almost surely, 2^28890051 is an apocalyptic number.

28890051 is a deficient number, since it is larger than the sum of its proper divisors (11657469).

28890051 is a wasteful number, since it uses less digits than its factorization.

28890051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506865.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 28890051 is about 5374.9466043859. The cubic root of 28890051 is about 306.8429170890.

The spelling of 28890051 in words is "twenty-eight million, eight hundred ninety thousand, fifty-one".