28464128 has 132 divisors (see below), whose sum is σ = 74871072. Its totient is φ = 10506240.

The previous prime is 28464101. The next prime is 28464131. The reversal of 28464128 is 82146482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1498103 + ... + 1498121.

Almost surely, 2^28464128 is an apocalyptic number.

28464128 is a gapful number since it is divisible by the number (28) 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 28464128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37435536).

28464128 is an abundant number, since it is smaller than the sum of its proper divisors (46406944).

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

28464128 is a wasteful number, since it uses less digits than its factorization.

28464128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 39 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 28464128 is about 5335.1783475344. The cubic root of 28464128 is about 305.3275277569.

The spelling of 28464128 in words is "twenty-eight million, four hundred sixty-four thousand, one hundred twenty-eight".