361209640 has 64 divisors (see below), whose sum is σ = 888693120. Its totient is φ = 131040000.

The previous prime is 361209599. The next prime is 361209661. The reversal of 361209640 is 46902163.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276990 + ... + 278290.

It is an arithmetic number, because the mean of its divisors is an integer number (13885830).

Almost surely, 2^361209640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 361209640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444346560).

361209640 is an abundant number, since it is smaller than the sum of its proper divisors (527483480).

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

361209640 is a wasteful number, since it uses less digits than its factorization.

361209640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 361209640 is about 19005.5160414023. The cubic root of 361209640 is about 712.1745405953.

The spelling of 361209640 in words is "three hundred sixty-one million, two hundred nine thousand, six hundred forty".