28907032 has 64 divisors (see below), whose sum is σ = 68221440. Its totient is φ = 11155200.

The previous prime is 28907029. The next prime is 28907033. The reversal of 28907032 is 23070982.

It is a junction number, because it is equal to n+sod(n) for n = 28906985 and 28907003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28907033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102732 + ... + 103012.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^28907032 is an apocalyptic number.

28907032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28907032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34110720).

28907032 is an abundant number, since it is smaller than the sum of its proper divisors (39314408).

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

28907032 is a wasteful number, since it uses less digits than its factorization.

28907032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 28907032 is about 5376.5260159326. The cubic root of 28907032 is about 306.9030240445.

The spelling of 28907032 in words is "twenty-eight million, nine hundred seven thousand, thirty-two".