28435974 has 36 divisors (see below), whose sum is σ = 66370572. Its totient is φ = 8098440.

The previous prime is 28435969. The next prime is 28435993. The reversal of 28435974 is 47953482.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91279 + ... + 91589.

It is an arithmetic number, because the mean of its divisors is an integer number (1843627).

Almost surely, 2^28435974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28435974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33185286).

28435974 is an abundant number, since it is smaller than the sum of its proper divisors (37934598).

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

28435974 is an equidigital number, since it uses as much as digits as its factorization.

28435974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 323 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 28435974 is about 5332.5391700390. The cubic root of 28435974 is about 305.2268275943.

The spelling of 28435974 in words is "twenty-eight million, four hundred thirty-five thousand, nine hundred seventy-four".