28454550 has 24 divisors (see below), whose sum is σ = 70567656. Its totient is φ = 7587840.

The previous prime is 28454537. The next prime is 28454557. The reversal of 28454550 is 5545482.

It is a super-2 number, since 2×28454550² = 1619322831405000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94699 + ... + 94998.

It is an arithmetic number, because the mean of its divisors is an integer number (2940319).

Almost surely, 2^28454550 is an apocalyptic number.

28454550 is an abundant number, since it is smaller than the sum of its proper divisors (42113106).

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

28454550 is a wasteful number, since it uses less digits than its factorization.

28454550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189712 (or 189707 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 28454550 is about 5334.2806450355. The cubic root of 28454550 is about 305.2932769842.

The spelling of 28454550 in words is "twenty-eight million, four hundred fifty-four thousand, five hundred fifty".