28990746 has 36 divisors (see below), whose sum is σ = 66737502. Its totient is φ = 9093504.

The previous prime is 28990739. The next prime is 28990747. The reversal of 28990746 is 64709982.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24890121 + 4100625 = 4989^2 + 2025^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28990747) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2416 + ... + 7988.

Almost surely, 2^28990746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28990746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33368751).

28990746 is an abundant number, since it is smaller than the sum of its proper divisors (37746756).

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

28990746 is a wasteful number, since it uses less digits than its factorization.

28990746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 28990746 is about 5384.3055262494. The cubic root of 28990746 is about 307.1989995288.

The spelling of 28990746 in words is "twenty-eight million, nine hundred ninety thousand, seven hundred forty-six".