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BaseRepresentation
bin110110011010…
…1110101111010
31222200120200002
41230311311322
524301011330
62455313002
7464342636
oct154656572
958616602
1028532090
1115118644
12967b762
135bacac2
143b09dc6
152788e45
hex1b35d7a

28532090 has 24 divisors (see below), whose sum is σ = 53085780. Its totient is φ = 11040960.

The previous prime is 28532089. The next prime is 28532099. The reversal of 28532090 is 9023582.

It can be written as a sum of positive squares in 2 ways, for example, as 23687689 + 4844401 = 4867^2 + 2201^2 .

It is not an unprimeable number, because it can be changed into a prime (28532099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8126 + ... + 11094.

Almost surely, 228532090 is an apocalyptic number.

28532090 is a deficient number, since it is larger than the sum of its proper divisors (24553690).

28532090 is a wasteful number, since it uses less digits than its factorization.

28532090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038 (or 3007 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 28532090 is about 5341.5437843380. The cubic root of 28532090 is about 305.5703383604.

The spelling of 28532090 in words is "twenty-eight million, five hundred thirty-two thousand, ninety".