28429308 has 36 divisors (see below), whose sum is σ = 72276568. Its totient is φ = 9421920.

The previous prime is 28429307. The next prime is 28429337. The reversal of 28429308 is 80392482.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28429307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4335 + ... + 8697.

Almost surely, 2^28429308 is an apocalyptic number.

It is an amenable number.

28429308 is an abundant number, since it is smaller than the sum of its proper divisors (43847260).

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

28429308 is a wasteful number, since it uses less digits than its factorization.

28429308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554 (or 4549 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28429308 is about 5331.9141028340. The cubic root of 28429308 is about 305.2029751666.

It can be divided in two parts, 284 and 29308, that added together give a palindrome (29592).

The spelling of 28429308 in words is "twenty-eight million, four hundred twenty-nine thousand, three hundred eight".