369213138 has 54 divisors (see below), whose sum is σ = 932008311. Its totient is φ = 105326424.

The previous prime is 369213127. The next prime is 369213167. The reversal of 369213138 is 831312963.

It can be written as a sum of positive squares in only one way, i.e., 184606569 + 184606569 = 13587^2 + 13587^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=13587.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 570331 + ... + 570977.

Almost surely, 2^369213138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 369213138

369213138 is an abundant number, since it is smaller than the sum of its proper divisors (562795173).

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

369213138 is an equidigital number, since it uses as much as digits as its factorization.

369213138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 659 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 369213138 is about 19214.9196719632. The cubic root of 369213138 is about 717.3961618519.

Multiplying 369213138 by its product of digits (23328), we get a square (8613004083264 = 2934792²).

The spelling of 369213138 in words is "three hundred sixty-nine million, two hundred thirteen thousand, one hundred thirty-eight".