36220781 has 8 divisors (see below), whose sum is σ = 36664320. Its totient is φ = 35779968.

The previous prime is 36220777. The next prime is 36220787. The reversal of 36220781 is 18702263.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 36220781 - 2² = 36220777 is a prime.

It is a super-2 number, since 2×36220781² = 2623889952499922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36220787) 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, 38525 + ... + 39453.

It is an arithmetic number, because the mean of its divisors is an integer number (4583040).

Almost surely, 2^36220781 is an apocalyptic number.

It is an amenable number.

36220781 is a deficient number, since it is larger than the sum of its proper divisors (443539).

36220781 is a wasteful number, since it uses less digits than its factorization.

36220781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 36220781 is about 6018.3702943571. The cubic root of 36220781 is about 330.8663522777.

The spelling of 36220781 in words is "thirty-six million, two hundred twenty thousand, seven hundred eighty-one".