28420698 has 16 divisors (see below), whose sum is σ = 57373920. Its totient is φ = 9384816.

The previous prime is 28420673. The next prime is 28420723. The reversal of 28420698 is 89602482.

It is an interprime number because it is at equal distance from previous prime (28420673) and next prime (28420723).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21493 + ... + 22776.

It is an arithmetic number, because the mean of its divisors is an integer number (3585870).

Almost surely, 2^28420698 is an apocalyptic number.

28420698 is an abundant number, since it is smaller than the sum of its proper divisors (28953222).

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

28420698 is a wasteful number, since it uses less digits than its factorization.

28420698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44381.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28420698 is about 5331.1066393386. The cubic root of 28420698 is about 305.1721611566.

The spelling of 28420698 in words is "twenty-eight million, four hundred twenty thousand, six hundred ninety-eight".