36403281 has 12 divisors (see below), whose sum is σ = 52639860. Its totient is φ = 24242400.

The previous prime is 36403277. The next prime is 36403303. The reversal of 36403281 is 18230463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 34398225 = 1416^2 + 5865^2 .

It is not a de Polignac number, because 36403281 - 2² = 36403277 is a prime.

It is a super-2 number, since 2×36403281² = 2650397735129922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36403261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10155 + ... + 13263.

It is an arithmetic number, because the mean of its divisors is an integer number (4386655).

Almost surely, 2^36403281 is an apocalyptic number.

It is an amenable number.

36403281 is a deficient number, since it is larger than the sum of its proper divisors (16236579).

36403281 is a wasteful number, since it uses less digits than its factorization.

36403281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 36403281 is about 6033.5131556996. The cubic root of 36403281 is about 331.4211164788.

The spelling of 36403281 in words is "thirty-six million, four hundred three thousand, two hundred eighty-one".