27428461 has 4 divisors (see below), whose sum is σ = 28374300. Its totient is φ = 26482624.

The previous prime is 27428449. The next prime is 27428473. The reversal of 27428461 is 16482472.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (27428449) and next prime (27428473).

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 19053225 = 2894^2 + 4365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27428461 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 (27428411) 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, 472876 + ... + 472933.

It is an arithmetic number, because the mean of its divisors is an integer number (7093575).

Almost surely, 2^27428461 is an apocalyptic number.

It is an amenable number.

27428461 is a deficient number, since it is larger than the sum of its proper divisors (945839).

27428461 is an equidigital number, since it uses as much as digits as its factorization.

27428461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945838.

The product of its digits is 21504, while the sum is 34.

The square root of 27428461 is about 5237.2188230014. The cubic root of 27428461 is about 301.5785717279.

It can be divided in two parts, 27428 and 461, that added together give a square (27889 = 167²).

The spelling of 27428461 in words is "twenty-seven million, four hundred twenty-eight thousand, four hundred sixty-one".