28040398 has 8 divisors (see below), whose sum is σ = 42339600. Its totient is φ = 13927200.

The previous prime is 28040387. The next prime is 28040407. The reversal of 28040398 is 89304082.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46123 + ... + 46726.

It is an arithmetic number, because the mean of its divisors is an integer number (5292450).

Almost surely, 2^28040398 is an apocalyptic number.

28040398 is a deficient number, since it is larger than the sum of its proper divisors (14299202).

28040398 is a wasteful number, since it uses less digits than its factorization.

28040398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93002.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28040398 is about 5295.3184984475. The cubic root of 28040398 is about 303.8048652495.

The spelling of 28040398 in words is "twenty-eight million, forty thousand, three hundred ninety-eight".