28650380 has 36 divisors (see below), whose sum is σ = 66138240. Its totient is φ = 10417440.

The previous prime is 28650361. The next prime is 28650397. The reversal of 28650380 is 8305682.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 3500 + ... + 8339.

Almost surely, 2^28650380 is an apocalyptic number.

28650380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28650380 is an abundant number, since it is smaller than the sum of its proper divisors (37487860).

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

28650380 is a wasteful number, since it uses less digits than its factorization.

28650380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11870 (or 11857 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28650380 is about 5352.6049732817. The cubic root of 28650380 is about 305.9920398915.

The spelling of 28650380 in words is "twenty-eight million, six hundred fifty thousand, three hundred eighty".