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28462225 = 52112972
BaseRepresentation
bin110110010010…
…0110010010001
31222120000211111
41230210302101
524241242400
62454013321
7463632151
oct154446221
958500744
1028462225
1115080100
129647241
135b8706c
143acc761
1527733ba
hex1b24c91

28462225 has 27 divisors (see below), whose sum is σ = 39197361. Its totient is φ = 20486400.

The previous prime is 28462223. The next prime is 28462229. The reversal of 28462225 is 52226482.

The square root of 28462225 is 5335.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1046529 + 27415696 = 1023^2 + 5236^2 .

It is not a de Polignac number, because 28462225 - 21 = 28462223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28462223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 293377 + ... + 293473.

Almost surely, 228462225 is an apocalyptic number.

28462225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28462225 is the 5335-th square number.

28462225 is the 2668-th centered octagonal number.

It is an amenable number.

28462225 is a deficient number, since it is larger than the sum of its proper divisors (10735136).

28462225 is an equidigital number, since it uses as much as digits as its factorization.

28462225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 113 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The cubic root of 28462225 is about 305.3207232715.

The spelling of 28462225 in words is "twenty-eight million, four hundred sixty-two thousand, two hundred twenty-five".