28413504 has 224 divisors, whose sum is σ = 99974400. Its totient is φ = 7838208.

The previous prime is 28413499. The next prime is 28413509. The reversal of 28413504 is 40531482.

It is an interprime number because it is at equal distance from previous prime (28413499) and next prime (28413509).

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28413509) 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, 979762 + ... + 979790.

Almost surely, 2^28413504 is an apocalyptic number.

28413504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28413504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49987200).

28413504 is an abundant number, since it is smaller than the sum of its proper divisors (71560896).

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

28413504 is an frugal number, since it uses more digits than its factorization.

28413504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28413504 is about 5330.4318774373. The cubic root of 28413504 is about 305.1464100439.

Adding to 28413504 its reverse (40531482), we get a palindrome (68944986).

The spelling of 28413504 in words is "twenty-eight million, four hundred thirteen thousand, five hundred four".