28036398 has 16 divisors (see below), whose sum is σ = 60386256. Its totient is φ = 8626560.

The previous prime is 28036391. The next prime is 28036403. The reversal of 28036398 is 89363082.

It is a super-2 number, since 2×28036398² = 1572079225628808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28036391) 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, 179643 + ... + 179798.

It is an arithmetic number, because the mean of its divisors is an integer number (3774141).

Almost surely, 2^28036398 is an apocalyptic number.

28036398 is an abundant number, since it is smaller than the sum of its proper divisors (32349858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28036398 is a wasteful number, since it uses less digits than its factorization.

28036398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359459.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28036398 is about 5294.9407928701. The cubic root of 28036398 is about 303.7904185067.

The spelling of 28036398 in words is "twenty-eight million, thirty-six thousand, three hundred ninety-eight".