28402038 has 48 divisors (see below), whose sum is σ = 70626816. Its totient is φ = 8080560.

The previous prime is 28402007. The next prime is 28402039. The reversal of 28402038 is 83020482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402039) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 54045 + ... + 54567.

It is an arithmetic number, because the mean of its divisors is an integer number (1471392).

Almost surely, 2^28402038 is an apocalyptic number.

28402038 is an abundant number, since it is smaller than the sum of its proper divisors (42224778).

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

28402038 is a wasteful number, since it uses less digits than its factorization.

28402038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 966 counting only the distinct ones).

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

The square root of 28402038 is about 5329.3562463022. The cubic root of 28402038 is about 305.1053582084.

The spelling of 28402038 in words is "twenty-eight million, four hundred two thousand, thirty-eight".