28431070 has 8 divisors (see below), whose sum is σ = 51175944. Its totient is φ = 11372424.

The previous prime is 28431031. The next prime is 28431071. The reversal of 28431070 is 7013482.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28431071) 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, 1421544 + ... + 1421563.

It is an arithmetic number, because the mean of its divisors is an integer number (6396993).

Almost surely, 2^28431070 is an apocalyptic number.

28431070 is a deficient number, since it is larger than the sum of its proper divisors (22744874).

28431070 is a wasteful number, since it uses less digits than its factorization.

28431070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843114.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28431070 is about 5332.0793317429. The cubic root of 28431070 is about 305.2092803562.

The spelling of 28431070 in words is "twenty-eight million, four hundred thirty-one thousand, seventy".