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28506791 is a prime number
BaseRepresentation
bin110110010111…
…1101010100111
31222122021222002
41230233222213
524244204131
62454555515
7464206115
oct154575247
958567862
1028506791
1115100635
129668b9b
135ba1431
143b00ab5
1527816cb
hex1b2faa7

28506791 has 2 divisors, whose sum is σ = 28506792. Its totient is φ = 28506790.

The previous prime is 28506781. The next prime is 28506799. The reversal of 28506791 is 19760582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28506791 - 210 = 28505767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28506799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14253395 + 14253396.

It is an arithmetic number, because the mean of its divisors is an integer number (14253396).

Almost surely, 228506791 is an apocalyptic number.

28506791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28506791 is an equidigital number, since it uses as much as digits as its factorization.

28506791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28506791 is about 5339.1751235561. The cubic root of 28506791 is about 305.4799966902.

The spelling of 28506791 in words is "twenty-eight million, five hundred six thousand, seven hundred ninety-one".