361391856 has 120 divisors (see below), whose sum is σ = 1143319680. Its totient is φ = 97808256.

The previous prime is 361391851. The next prime is 361391861. The reversal of 361391856 is 658193163.

It is a happy number.

361391856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (361391851) and next prime (361391861).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361391851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40645 + ... + 48731.

It is an arithmetic number, because the mean of its divisors is an integer number (9527664).

Almost surely, 2^361391856 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 361391856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571659840).

361391856 is an abundant number, since it is smaller than the sum of its proper divisors (781927824).

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

361391856 is a wasteful number, since it uses less digits than its factorization.

361391856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8131 (or 8118 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 361391856 is about 19010.3092031666. The cubic root of 361391856 is about 712.2942751083.

The spelling of 361391856 in words is "three hundred sixty-one million, three hundred ninety-one thousand, eight hundred fifty-six".