[go: up one dir, main page]

Search a number
-
+
27990073 = 97728649
BaseRepresentation
bin110101011000…
…1100000111001
31221200001011101
41222301200321
524131140243
62435531401
7456624466
oct152614071
957601141
1027990073
11148883a1
129459b61
135a50197
143a0866d
1526cd54d
hex1ab1839

27990073 has 4 divisors (see below), whose sum is σ = 28019700. Its totient is φ = 27960448.

The previous prime is 27990071. The next prime is 27990089. The reversal of 27990073 is 37009972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20548089 + 7441984 = 4533^2 + 2728^2 .

It is a cyclic number.

It is not a de Polignac number, because 27990073 - 21 = 27990071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27990071) 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, 13348 + ... + 15301.

It is an arithmetic number, because the mean of its divisors is an integer number (7004925).

Almost surely, 227990073 is an apocalyptic number.

It is an amenable number.

27990073 is a deficient number, since it is larger than the sum of its proper divisors (29627).

27990073 is an equidigital number, since it uses as much as digits as its factorization.

27990073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29626.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 27990073 is about 5290.5645256437. The cubic root of 27990073 is about 303.6230069711.

The spelling of 27990073 in words is "twenty-seven million, nine hundred ninety thousand, seventy-three".

Divisors: 1 977 28649 27990073