28425789 has 16 divisors (see below), whose sum is σ = 48128640. Its totient is φ = 16243200.

The previous prime is 28425781. The next prime is 28425811. The reversal of 28425789 is 98752482.

It is not a de Polignac number, because 28425789 - 2³ = 28425781 is a prime.

It is a super-3 number, since 3×28425789³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28425781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75012 + ... + 75389.

It is an arithmetic number, because the mean of its divisors is an integer number (3008040).

Almost surely, 2^28425789 is an apocalyptic number.

It is an amenable number.

28425789 is a deficient number, since it is larger than the sum of its proper divisors (19702851).

28425789 is a wasteful number, since it uses less digits than its factorization.

28425789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150417 (or 150411 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28425789 is about 5331.5840985583. The cubic root of 28425789 is about 305.1903818998.

The spelling of 28425789 in words is "twenty-eight million, four hundred twenty-five thousand, seven hundred eighty-nine".