28429996 has 36 divisors (see below), whose sum is σ = 58697688. Its totient is φ = 12011328.

The previous prime is 28429991. The next prime is 28430011. The reversal of 28429996 is 69992482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (28429991) 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, 13315 + ... + 15301.

Almost surely, 2^28429996 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 28429996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29348844).

28429996 is an abundant number, since it is smaller than the sum of its proper divisors (30267692).

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

28429996 is a wasteful number, since it uses less digits than its factorization.

28429996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078 (or 2069 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 28429996 is about 5331.9786196120. The cubic root of 28429996 is about 305.2054371559.

The spelling of 28429996 in words is "twenty-eight million, four hundred twenty-nine thousand, nine hundred ninety-six".