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5438909 = 7776987
BaseRepresentation
bin10100101111110110111101
3101020022210002
4110233312331
52343021114
6312324045
764141610
oct24576675
911208702
105438909
113085373
1219a3625
1311857b8
14a18177
157267de
hex52fdbd

5438909 has 4 divisors (see below), whose sum is σ = 6215904. Its totient is φ = 4661916.

The previous prime is 5438903. The next prime is 5438969. The reversal of 5438909 is 9098345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2k-5438909 is a prime.

It is a super-2 number, since 2×54389092 = 59163462220562, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5438903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388487 + ... + 388500.

It is an arithmetic number, because the mean of its divisors is an integer number (1553976).

Almost surely, 25438909 is an apocalyptic number.

It is an amenable number.

5438909 is a deficient number, since it is larger than the sum of its proper divisors (776995).

5438909 is an equidigital number, since it uses as much as digits as its factorization.

5438909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776994.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 5438909 is about 2332.1468650152. The cubic root of 5438909 is about 175.8614288915.

The spelling of 5438909 in words is "five million, four hundred thirty-eight thousand, nine hundred nine".

Divisors: 1 7 776987 5438909