28129070 has 8 divisors (see below), whose sum is σ = 50632344. Its totient is φ = 11251624.

The previous prime is 28129021. The next prime is 28129091. The reversal of 28129070 is 7092182.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406444 + ... + 1406463.

It is an arithmetic number, because the mean of its divisors is an integer number (6329043).

Almost surely, 2^28129070 is an apocalyptic number.

28129070 is a deficient number, since it is larger than the sum of its proper divisors (22503274).

28129070 is a wasteful number, since it uses less digits than its factorization.

28129070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812914.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 28129070 is about 5303.6845682978. The cubic root of 28129070 is about 304.1247684413.

The spelling of 28129070 in words is "twenty-eight million, one hundred twenty-nine thousand, seventy".