28922505 has 8 divisors (see below), whose sum is σ = 46276032. Its totient is φ = 15425328.

The previous prime is 28922501. The next prime is 28922513. The reversal of 28922505 is 50522982.

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

It is not a de Polignac number, because 28922505 - 2² = 28922501 is a prime.

It is a super-2 number, since 2×28922505² = 1673022590950050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28922501) 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, 964069 + ... + 964098.

It is an arithmetic number, because the mean of its divisors is an integer number (5784504).

Almost surely, 2^28922505 is an apocalyptic number.

It is an amenable number.

28922505 is a deficient number, since it is larger than the sum of its proper divisors (17353527).

28922505 is a wasteful number, since it uses less digits than its factorization.

28922505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928175.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28922505 is about 5377.9647637373. The cubic root of 28922505 is about 306.9577727007.

The spelling of 28922505 in words is "twenty-eight million, nine hundred twenty-two thousand, five hundred five".