28489464 has 24 divisors (see below), whose sum is σ = 77159160. Its totient is φ = 9496464.

The previous prime is 28489459. The next prime is 28489469. The reversal of 28489464 is 46498482.

It is an interprime number because it is at equal distance from previous prime (28489459) and next prime (28489469).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28489469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197772 + ... + 197915.

It is an arithmetic number, because the mean of its divisors is an integer number (3214965).

Almost surely, 2^28489464 is an apocalyptic number.

28489464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28489464 is an abundant number, since it is smaller than the sum of its proper divisors (48669696).

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

28489464 is a wasteful number, since it uses less digits than its factorization.

28489464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395699 (or 395692 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 28489464 is about 5337.5522479878. The cubic root of 28489464 is about 305.4180918541.

The spelling of 28489464 in words is "twenty-eight million, four hundred eighty-nine thousand, four hundred sixty-four".