28400360 has 16 divisors (see below), whose sum is σ = 63900900. Its totient is φ = 11360128.

The previous prime is 28400357. The next prime is 28400419. The reversal of 28400360 is 6300482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27520516 + 879844 = 5246^2 + 938^2 .

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 3 ways as a sum of consecutive naturals, for example, 354965 + ... + 355044.

Almost surely, 2^28400360 is an apocalyptic number.

28400360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28400360 is an abundant number, since it is smaller than the sum of its proper divisors (35500540).

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

28400360 is a wasteful number, since it uses less digits than its factorization.

28400360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710020 (or 710016 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 28400360 is about 5329.1988140808. The cubic root of 28400360 is about 305.0993495213.

The spelling of 28400360 in words is "twenty-eight million, four hundred thousand, three hundred sixty".