28403070 has 16 divisors (see below), whose sum is σ = 68167440. Its totient is φ = 7574144.

The previous prime is 28403069. The next prime is 28403077. The reversal of 28403070 is 7030482.

It is a self number, because there is not a number n which added to its sum of digits gives 28403070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28403077) 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, 473355 + ... + 473414.

It is an arithmetic number, because the mean of its divisors is an integer number (4260465).

Almost surely, 2^28403070 is an apocalyptic number.

28403070 is an abundant number, since it is smaller than the sum of its proper divisors (39764370).

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

28403070 is a wasteful number, since it uses less digits than its factorization.

28403070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946779.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 28403070 is about 5329.4530676234. The cubic root of 28403070 is about 305.1090535408.

The spelling of 28403070 in words is "twenty-eight million, four hundred three thousand, seventy".