1356404238 has 128 divisors (see below), whose sum is σ = 3560739840. Its totient is φ = 374647680.

The previous prime is 1356404221. The next prime is 1356404239. The reversal of 1356404238 is 8324046531.

1356404238 is a `hidden beast` number, since 1 + 3 + 5 + 640 + 4 + 2 + 3 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356404239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4097733 + ... + 4098063.

It is an arithmetic number, because the mean of its divisors is an integer number (27818280).

Almost surely, 2^1356404238 is an apocalyptic number.

1356404238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1356404238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1780369920).

1356404238 is an abundant number, since it is smaller than the sum of its proper divisors (2204335602).

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

1356404238 is a wasteful number, since it uses less digits than its factorization.

1356404238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1356404238 is about 36829.3936686446. The cubic root of 1356404238 is about 1106.9543536234.

The spelling of 1356404238 in words is "one billion, three hundred fifty-six million, four hundred four thousand, two hundred thirty-eight".