28455000 has 160 divisors (see below), whose sum is σ = 101967360. Its totient is φ = 6480000.

The previous prime is 28454999. The next prime is 28455001. The reversal of 28455000 is 55482.

It is an interprime number because it is at equal distance from previous prime (28454999) and next prime (28455001).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104865 + ... + 105135.

It is an arithmetic number, because the mean of its divisors is an integer number (637296).

Almost surely, 2^28455000 is an apocalyptic number.

28455000 is a gapful number since it is divisible by the number (20) 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 28455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50983680).

28455000 is an abundant number, since it is smaller than the sum of its proper divisors (73512360).

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

28455000 is a wasteful number, since it uses less digits than its factorization.

28455000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28455000 is about 5334.3228248766. The cubic root of 28455000 is about 305.2948863489.

The spelling of 28455000 in words is "twenty-eight million, four hundred fifty-five thousand".