28070901 has 16 divisors (see below), whose sum is σ = 42712000. Its totient is φ = 18207504.

The previous prime is 28070881. The next prime is 28070929. The reversal of 28070901 is 10907082.

It is not a de Polignac number, because 28070901 - 2²³ = 19682293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13051 + ... + 15048.

It is an arithmetic number, because the mean of its divisors is an integer number (2669500).

Almost surely, 2^28070901 is an apocalyptic number.

It is an amenable number.

28070901 is a deficient number, since it is larger than the sum of its proper divisors (14641099).

28070901 is a wasteful number, since it uses less digits than its factorization.

28070901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28145 (or 28139 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 28070901 is about 5298.1979011736. The cubic root of 28070901 is about 303.9149873379.

Adding to 28070901 its reverse (10907082), we get a palindrome (38977983).

The spelling of 28070901 in words is "twenty-eight million, seventy thousand, nine hundred one".