28401598 has 4 divisors (see below), whose sum is σ = 42602400. Its totient is φ = 14200798.

The previous prime is 28401589. The next prime is 28401601. The reversal of 28401598 is 89510482.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7100398 + ... + 7100401.

It is an arithmetic number, because the mean of its divisors is an integer number (10650600).

Almost surely, 2^28401598 is an apocalyptic number.

28401598 is a deficient number, since it is larger than the sum of its proper divisors (14200802).

28401598 is a wasteful number, since it uses less digits than its factorization.

28401598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200801.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28401598 is about 5329.3149653591. The cubic root of 28401598 is about 305.1037826518.

The spelling of 28401598 in words is "twenty-eight million, four hundred one thousand, five hundred ninety-eight".