27700405 has 8 divisors (see below), whose sum is σ = 33785784. Its totient is φ = 21796800.

The previous prime is 27700403. The next prime is 27700417. The reversal of 27700405 is 50400772.

It can be written as a sum of positive squares in 4 ways, for example, as 232324 + 27468081 = 482^2 + 5241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27700405 - 2¹ = 27700403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27700405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27700403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45106 + ... + 45715.

It is an arithmetic number, because the mean of its divisors is an integer number (4223223).

Almost surely, 2^27700405 is an apocalyptic number.

It is an amenable number.

27700405 is a deficient number, since it is larger than the sum of its proper divisors (6085379).

27700405 is an equidigital number, since it uses as much as digits as its factorization.

27700405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90887.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 27700405 is about 5263.1174222128. The cubic root of 27700405 is about 302.5719793196.

The spelling of 27700405 in words is "twenty-seven million, seven hundred thousand, four hundred five".