28207344 has 80 divisors (see below), whose sum is σ = 81494784. Its totient is φ = 8332800.

The previous prime is 28207337. The next prime is 28207351. The reversal of 28207344 is 44370282.

It is an interprime number because it is at equal distance from previous prime (28207337) and next prime (28207351).

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 15 ways as a sum of consecutive naturals, for example, 20997 + ... + 22299.

Almost surely, 2^28207344 is an apocalyptic number.

28207344 is a gapful number since it is divisible by the number (24) 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 28207344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40747392).

28207344 is an abundant number, since it is smaller than the sum of its proper divisors (53287440).

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

28207344 is a wasteful number, since it uses less digits than its factorization.

28207344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 28207344 is about 5311.0586515308. The cubic root of 28207344 is about 304.4066004349.

The spelling of 28207344 in words is "twenty-eight million, two hundred seven thousand, three hundred forty-four".