365881540 has 24 divisors (see below), whose sum is σ = 787093272. Its totient is φ = 142782720.

The previous prime is 365881507. The next prime is 365881541. The reversal of 365881540 is 45188563.

It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 365880384 = 34^2 + 19128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 365881493 and 365881502.

It is not an unprimeable number, because it can be changed into a prime (365881541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222279 + ... + 223918.

It is an arithmetic number, because the mean of its divisors is an integer number (32795553).

Almost surely, 2^365881540 is an apocalyptic number.

It is an amenable number.

365881540 is an abundant number, since it is smaller than the sum of its proper divisors (421211732).

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

365881540 is a wasteful number, since it uses less digits than its factorization.

365881540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446247 (or 446245 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 365881540 is about 19128.0302174584. The cubic root of 365881540 is about 715.2318285853.

The spelling of 365881540 in words is "three hundred sixty-five million, eight hundred eighty-one thousand, five hundred forty".