28299380 has 24 divisors (see below), whose sum is σ = 60184320. Its totient is φ = 11175840.

The previous prime is 28299377. The next prime is 28299391. The reversal of 28299380 is 8399282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7376 + ... + 10535.

It is an arithmetic number, because the mean of its divisors is an integer number (2507680).

Almost surely, 2^28299380 is an apocalyptic number.

28299380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28299380 is an abundant number, since it is smaller than the sum of its proper divisors (31884940).

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

28299380 is a wasteful number, since it uses less digits than its factorization.

28299380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17999 (or 17997 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 28299380 is about 5319.7161578415. The cubic root of 28299380 is about 304.7373174996.

The spelling of 28299380 in words is "twenty-eight million, two hundred ninety-nine thousand, three hundred eighty".