28402437 has 16 divisors (see below), whose sum is σ = 43666560. Its totient is φ = 16084992.

The previous prime is 28402433. The next prime is 28402453. The reversal of 28402437 is 73420482.

It is not a de Polignac number, because 28402437 - 2² = 28402433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402433) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3612 + ... + 8357.

It is an arithmetic number, because the mean of its divisors is an integer number (2729160).

Almost surely, 2^28402437 is an apocalyptic number.

It is an amenable number.

28402437 is a deficient number, since it is larger than the sum of its proper divisors (15264123).

28402437 is a wasteful number, since it uses less digits than its factorization.

28402437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12092.

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

The square root of 28402437 is about 5329.3936803355. The cubic root of 28402437 is about 305.1067869377.

The spelling of 28402437 in words is "twenty-eight million, four hundred two thousand, four hundred thirty-seven".