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28024570 = 257257193
BaseRepresentation
bin110101011100…
…1111011111010
31221201210111001
41222321323322
524133241240
62440355214
7460130200
oct152717372
957653431
1028024570
1114901302
129475b0a
135a62ab2
143a17070
1526d889a
hex1ab9efa

28024570 has 24 divisors (see below), whose sum is σ = 58681044. Its totient is φ = 9608256.

The previous prime is 28024567. The next prime is 28024613. The reversal of 28024570 is 7542082.

It can be written as a sum of positive squares in 2 ways, for example, as 27050401 + 974169 = 5201^2 + 987^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28107 + ... + 29086.

Almost surely, 228024570 is an apocalyptic number.

28024570 is an abundant number, since it is smaller than the sum of its proper divisors (30656474).

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

28024570 is a wasteful number, since it uses less digits than its factorization.

28024570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57214 (or 57207 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 28024570 is about 5293.8237598167. The cubic root of 28024570 is about 303.7476914477.

The spelling of 28024570 in words is "twenty-eight million, twenty-four thousand, five hundred seventy".

Divisors: 1 2 5 7 10 14 35 49 70 98 245 490 57193 114386 285965 400351 571930 800702 2001755 2802457 4003510 5604914 14012285 28024570