28070922 has 16 divisors (see below), whose sum is σ = 61245792. Its totient is φ = 8506320.

The previous prime is 28070881. The next prime is 28070929. The reversal of 28070922 is 22907082.

It is a self number, because there is not a number n which added to its sum of digits gives 28070922.

It is not an unprimeable number, because it can be changed into a prime (28070929) 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, 212593 + ... + 212724.

It is an arithmetic number, because the mean of its divisors is an integer number (3827862).

Almost surely, 2^28070922 is an apocalyptic number.

28070922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28070922 is an abundant number, since it is smaller than the sum of its proper divisors (33174870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28070922 is a wasteful number, since it uses less digits than its factorization.

28070922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425333.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28070922 is about 5298.1998829791. The cubic root of 28070922 is about 303.9150631247.

The spelling of 28070922 in words is "twenty-eight million, seventy thousand, nine hundred twenty-two".