361646440 has 32 divisors (see below), whose sum is σ = 861571080. Its totient is φ = 136148992.

The previous prime is 361646429. The next prime is 361646449. The reversal of 361646440 is 44646163.

It can be written as a sum of positive squares in 4 ways, for example, as 361532196 + 114244 = 19014^2 + 338^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 361646396 and 361646405.

It is not an unprimeable number, because it can be changed into a prime (361646449) 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 7 ways as a sum of consecutive naturals, for example, 265237 + ... + 266596.

Almost surely, 2^361646440 is an apocalyptic number.

It is an amenable number.

361646440 is an abundant number, since it is smaller than the sum of its proper divisors (499924640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

361646440 is a wasteful number, since it uses less digits than its factorization.

361646440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531861 (or 531857 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 361646440 is about 19017.0039701316. The cubic root of 361646440 is about 712.4614954056.

The spelling of 361646440 in words is "three hundred sixty-one million, six hundred forty-six thousand, four hundred forty".