361720424 has 64 divisors (see below), whose sum is σ = 780872400. Its totient is φ = 155602944.

The previous prime is 361720397. The next prime is 361720427. The reversal of 361720424 is 424027163.

It can be written as a sum of positive squares in 8 ways, for example, as 222904900 + 138815524 = 14930^2 + 11782^2 .

It is not an unprimeable number, because it can be changed into a prime (361720427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191774 + ... + 193650.

Almost surely, 2^361720424 is an apocalyptic number.

361720424 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 361720424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390436200).

361720424 is an abundant number, since it is smaller than the sum of its proper divisors (419151976).

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

361720424 is a wasteful number, since it uses less digits than its factorization.

361720424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 361720424 is about 19018.9490771704. The cubic root of 361720424 is about 712.5100761476.

Adding to 361720424 its reverse (424027163), we get a palindrome (785747587).

The spelling of 361720424 in words is "three hundred sixty-one million, seven hundred twenty thousand, four hundred twenty-four".