28429056 has 108 divisors (see below), whose sum is σ = 85189832. Its totient is φ = 9455616.

The previous prime is 28429043. The next prime is 28429067. The reversal of 28429056 is 65092482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a super-2 number, since 2×28429056² = 1616422450102272, which contains 22 as substring.

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

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 28429056.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61980 + ... + 62436.

Almost surely, 2^28429056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28429056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42594916).

28429056 is an abundant number, since it is smaller than the sum of its proper divisors (56760776).

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

28429056 is an frugal number, since it uses more digits than its factorization.

28429056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28429056 is about 5331.8904714932. The cubic root of 28429056 is about 305.2020733816.

The spelling of 28429056 in words is "twenty-eight million, four hundred twenty-nine thousand, fifty-six".