27961801 has 6 divisors (see below), whose sum is σ = 32527050. Its totient is φ = 23967216.

The previous prime is 27961799. The next prime is 27961807. The reversal of 27961801 is 10816972.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 12595401 = 3920^2 + 3549^2 .

It is not a de Polignac number, because 27961801 - 2¹ = 27961799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27961807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285276 + ... + 285373.

It is an arithmetic number, because the mean of its divisors is an integer number (5421175).

Almost surely, 2^27961801 is an apocalyptic number.

It is an amenable number.

27961801 is a deficient number, since it is larger than the sum of its proper divisors (4565249).

27961801 is an equidigital number, since it uses as much as digits as its factorization.

27961801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570663 (or 570656 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 27961801 is about 5287.8919240090. The cubic root of 27961801 is about 303.5207454605.

The spelling of 27961801 in words is "twenty-seven million, nine hundred sixty-one thousand, eight hundred one".