28461504 has 56 divisors (see below), whose sum is σ = 75720448. Its totient is φ = 9434880.

The previous prime is 28461493. The next prime is 28461509. The reversal of 28461504 is 40516482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51759 + ... + 52305.

Almost surely, 2^28461504 is an apocalyptic number.

28461504 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 28461504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37860224).

28461504 is an abundant number, since it is smaller than the sum of its proper divisors (47258944).

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

28461504 is a wasteful number, since it uses less digits than its factorization.

28461504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28461504 is about 5334.9324269385. The cubic root of 28461504 is about 305.3181451397.

Adding to 28461504 its reverse (40516482), we get a palindrome (68977986).

The spelling of 28461504 in words is "twenty-eight million, four hundred sixty-one thousand, five hundred four".