28571422 has 16 divisors (see below), whose sum is σ = 47319552. Its totient is φ = 12829720.

The previous prime is 28571401. The next prime is 28571423. The reversal of 28571422 is 22417582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5998 + ... + 9649.

It is an arithmetic number, because the mean of its divisors is an integer number (2957472).

Almost surely, 2^28571422 is an apocalyptic number.

28571422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28571422 is a deficient number, since it is larger than the sum of its proper divisors (18748130).

28571422 is a wasteful number, since it uses less digits than its factorization.

28571422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15743.

The product of its digits is 8960, while the sum is 31.

The square root of 28571422 is about 5345.2242235476. The cubic root of 28571422 is about 305.7106852951.

The spelling of 28571422 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred twenty-two".