28571402 has 8 divisors (see below), whose sum is σ = 45112800. Its totient is φ = 13533804.

The previous prime is 28571401. The next prime is 28571423. The reversal of 28571402 is 20417582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28571401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375902 + ... + 375977.

It is an arithmetic number, because the mean of its divisors is an integer number (5639100).

Almost surely, 2^28571402 is an apocalyptic number.

28571402 is a deficient number, since it is larger than the sum of its proper divisors (16541398).

28571402 is a wasteful number, since it uses less digits than its factorization.

28571402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751900.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 28571402 is about 5345.2223527184. Note that the first 3 decimals coincide. The cubic root of 28571402 is about 305.7106139625.

Adding to 28571402 its reverse (20417582), we get a palindrome (48988984).

The spelling of 28571402 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred two".