28470690 has 40 divisors (see below), whose sum is σ = 76556700. Its totient is φ = 7591968.

The previous prime is 28470653. The next prime is 28470697. The reversal of 28470690 is 9607482.

It can be written as a sum of positive squares in 2 ways, for example, as 28291761 + 178929 = 5319^2 + 423^2 .

It is a super-3 number, since 3×28470690³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28470697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16765 + ... + 18384.

Almost surely, 2^28470690 is an apocalyptic number.

28470690 is an abundant number, since it is smaller than the sum of its proper divisors (48086010).

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

28470690 is a wasteful number, since it uses less digits than its factorization.

28470690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35168 (or 35159 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28470690 is about 5335.7932868506. The cubic root of 28470690 is about 305.3509889276.

The spelling of 28470690 in words is "twenty-eight million, four hundred seventy thousand, six hundred ninety".