28989402 has 64 divisors (see below), whose sum is σ = 67952640. Its totient is φ = 8164800.

The previous prime is 28989397. The next prime is 28989409. The reversal of 28989402 is 20498982.

It is not an unprimeable number, because it can be changed into a prime (28989409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45627 + ... + 46257.

It is an arithmetic number, because the mean of its divisors is an integer number (1061760).

Almost surely, 2^28989402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28989402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33976320).

28989402 is an abundant number, since it is smaller than the sum of its proper divisors (38963238).

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

28989402 is a wasteful number, since it uses less digits than its factorization.

28989402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 28989402 is about 5384.1807176208. The cubic root of 28989402 is about 307.1942522457.

The spelling of 28989402 in words is "twenty-eight million, nine hundred eighty-nine thousand, four hundred two".