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28331043 = 313739983
BaseRepresentation
bin110110000010…
…0110000100011
31222022100212220
41230010300203
524223043133
62451122123
7462544536
oct154046043
958270786
1028331043
1114aa0594
1295a3343
135b3c440
143a96a1d
1527495b3
hex1b04c23

28331043 has 16 divisors (see below), whose sum is σ = 40776960. Its totient is φ = 17393184.

The previous prime is 28331029. The next prime is 28331047. The reversal of 28331043 is 34013382.

It is not a de Polignac number, because 28331043 - 26 = 28330979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28331047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28330 + ... + 29312.

It is an arithmetic number, because the mean of its divisors is an integer number (2548560).

Almost surely, 228331043 is an apocalyptic number.

28331043 is a deficient number, since it is larger than the sum of its proper divisors (12445917).

28331043 is a wasteful number, since it uses less digits than its factorization.

28331043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 28331043 is about 5322.6913305207. The cubic root of 28331043 is about 304.8509277782.

The spelling of 28331043 in words is "twenty-eight million, three hundred thirty-one thousand, forty-three".

Divisors: 1 3 13 39 739 983 2217 2949 9607 12779 28821 38337 726437 2179311 9443681 28331043