28909498 has 8 divisors (see below), whose sum is σ = 43676640. Its totient is φ = 14350620.

The previous prime is 28909477. The next prime is 28909499. The reversal of 28909498 is 89490982.

It is a happy number.

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

It is a super-2 number, since 2×28909498² = 1671518149224008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28909499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51718 + ... + 52273.

It is an arithmetic number, because the mean of its divisors is an integer number (5459580).

Almost surely, 2^28909498 is an apocalyptic number.

28909498 is a deficient number, since it is larger than the sum of its proper divisors (14767142).

28909498 is a wasteful number, since it uses less digits than its factorization.

28909498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104132.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 28909498 is about 5376.7553412816. The cubic root of 28909498 is about 306.9117508869.

The spelling of 28909498 in words is "twenty-eight million, nine hundred nine thousand, four hundred ninety-eight".