28007340 has 48 divisors (see below), whose sum is σ = 79602432. Its totient is φ = 7356096.

The previous prime is 28007339. The next prime is 28007363. The reversal of 28007340 is 4370082.

It is a super-2 number, since 2×28007340² = 1568822187751200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28007340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537 + ... + 7503.

It is an arithmetic number, because the mean of its divisors is an integer number (1658384).

Almost surely, 2^28007340 is an apocalyptic number.

28007340 is a gapful number since it is divisible by the number (20) 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 28007340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39801216).

28007340 is an abundant number, since it is smaller than the sum of its proper divisors (51595092).

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

28007340 is a wasteful number, since it uses less digits than its factorization.

28007340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7046 (or 7044 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 28007340 is about 5292.1961414898. The cubic root of 28007340 is about 303.6854288730.

The spelling of 28007340 in words is "twenty-eight million, seven thousand, three hundred forty".