28925919 has 12 divisors (see below), whose sum is σ = 45580392. Its totient is φ = 17530800.

The previous prime is 28925917. The next prime is 28925921. The reversal of 28925919 is 91952982.

It is an interprime number because it is at equal distance from previous prime (28925917) and next prime (28925921).

It is not a de Polignac number, because 28925919 - 2¹ = 28925917 is a prime.

It is a super-2 number, since 2×28925919² = 1673417579989122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28925917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145992 + ... + 146189.

It is an arithmetic number, because the mean of its divisors is an integer number (3798366).

Almost surely, 2^28925919 is an apocalyptic number.

28925919 is a deficient number, since it is larger than the sum of its proper divisors (16654473).

28925919 is a wasteful number, since it uses less digits than its factorization.

28925919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292198 (or 292195 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 28925919 is about 5378.2821606903. The cubic root of 28925919 is about 306.9698499465.

The spelling of 28925919 in words is "twenty-eight million, nine hundred twenty-five thousand, nine hundred nineteen".