28400832 has 42 divisors (see below), whose sum is σ = 81407508. Its totient is φ = 9466752.

The previous prime is 28400819. The next prime is 28400843. The reversal of 28400832 is 23800482.

It is a junction number, because it is equal to n+sod(n) for n = 28400796 and 28400805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24078 + ... + 25229.

It is an arithmetic number, because the mean of its divisors is an integer number (1938274).

Almost surely, 2^28400832 is an apocalyptic number.

It is an amenable number.

28400832 is an abundant number, since it is smaller than the sum of its proper divisors (53006676).

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

28400832 is a wasteful number, since it uses less digits than its factorization.

28400832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49325 (or 49312 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28400832 is about 5329.2430982270. The cubic root of 28400832 is about 305.1010397123.

The spelling of 28400832 in words is "twenty-eight million, four hundred thousand, eight hundred thirty-two".