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28990759 = 78634799
BaseRepresentation
bin110111010010…
…1110100100111
32000112212211211
41232211310213
524410201014
62513212251
7501263110
oct156456447
960485754
1028990759
1115401206
129861087
1360107c5
143bc9207
152829cc4
hex1ba5d27

28990759 has 8 divisors (see below), whose sum is σ = 33177600. Its totient is φ = 24815256.

The previous prime is 28990757. The next prime is 28990769. The reversal of 28990759 is 95709982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28990759 - 21 = 28990757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28990757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3642 + ... + 8440.

It is an arithmetic number, because the mean of its divisors is an integer number (4147200).

Almost surely, 228990759 is an apocalyptic number.

28990759 is a deficient number, since it is larger than the sum of its proper divisors (4186841).

28990759 is an equidigital number, since it uses as much as digits as its factorization.

28990759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 28990759 is about 5384.3067334616. The cubic root of 28990759 is about 307.1990454468.

The spelling of 28990759 in words is "twenty-eight million, nine hundred ninety thousand, seven hundred fifty-nine".

Divisors: 1 7 863 4799 6041 33593 4141537 28990759