36028981 has 4 divisors (see below), whose sum is σ = 36041292. Its totient is φ = 36016672.

The previous prime is 36028973. The next prime is 36028987. The reversal of 36028981 is 18982063.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18982063 = 71 ⋅267353.

It can be written as a sum of positive squares in 2 ways, for example, as 32547025 + 3481956 = 5705^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 36028981 - 2³ = 36028973 is a prime.

It is a super-2 number, since 2×36028981² = 2596174943796722, which contains 22 as substring.

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 36028981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36028987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (9010323).

Almost surely, 2^36028981 is an apocalyptic number.

It is an amenable number.

36028981 is a deficient number, since it is larger than the sum of its proper divisors (12311).

36028981 is an equidigital number, since it uses as much as digits as its factorization.

36028981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12310.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 36028981 is about 6002.4145974766. The cubic root of 36028981 is about 330.2813058955.

The spelling of 36028981 in words is "thirty-six million, twenty-eight thousand, nine hundred eighty-one".