361991144 has 8 divisors (see below), whose sum is σ = 678733410. Its totient is φ = 180995568.

The previous prime is 361991143. The next prime is 361991177. The reversal of 361991144 is 441199163.

It can be written as a sum of positive squares in only one way, i.e., 292068100 + 69923044 = 17090^2 + 8362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×361991144³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 361991098 and 361991107.

It is not an unprimeable number, because it can be changed into a prime (361991143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22624439 + ... + 22624454.

Almost surely, 2^361991144 is an apocalyptic number.

It is an amenable number.

361991144 is a deficient number, since it is larger than the sum of its proper divisors (316742266).

361991144 is a wasteful number, since it uses less digits than its factorization.

361991144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45248899 (or 45248895 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 361991144 is about 19026.0648585040. The cubic root of 361991144 is about 712.6877848730.

The spelling of 361991144 in words is "three hundred sixty-one million, nine hundred ninety-one thousand, one hundred forty-four".