28428670 has 16 divisors (see below), whose sum is σ = 52138080. Its totient is φ = 11156704.

The previous prime is 28428661. The next prime is 28428679. The reversal of 28428670 is 7682482.

It is an interprime number because it is at equal distance from previous prime (28428661) and next prime (28428679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28428679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26290 + ... + 27349.

It is an arithmetic number, because the mean of its divisors is an integer number (3258630).

Almost surely, 2^28428670 is an apocalyptic number.

28428670 is a deficient number, since it is larger than the sum of its proper divisors (23709410).

28428670 is a wasteful number, since it uses less digits than its factorization.

28428670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53699.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28428670 is about 5331.8542740776. The cubic root of 28428670 is about 305.2006920655.

The spelling of 28428670 in words is "twenty-eight million, four hundred twenty-eight thousand, six hundred seventy".