28598381 has 8 divisors (see below), whose sum is σ = 32718144. Its totient is φ = 24487200.

The previous prime is 28598377. The next prime is 28598387. The reversal of 28598381 is 18389582.

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

It is a cyclic number.

It is not a de Polignac number, because 28598381 - 2² = 28598377 is a prime.

It is a super-2 number, since 2×28598381² = 1635734791642322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28598387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8606 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (4089768).

Almost surely, 2^28598381 is an apocalyptic number.

It is an amenable number.

28598381 is a deficient number, since it is larger than the sum of its proper divisors (4119763).

28598381 is a wasteful number, since it uses less digits than its factorization.

28598381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291.

The product of its digits is 138240, while the sum is 44.

The square root of 28598381 is about 5347.7454127885. The cubic root of 28598381 is about 305.8068077252.

The spelling of 28598381 in words is "twenty-eight million, five hundred ninety-eight thousand, three hundred eighty-one".