344400136 has 8 divisors (see below), whose sum is σ = 645750270. Its totient is φ = 172200064.

The previous prime is 344400131. The next prime is 344400191. The reversal of 344400136 is 631004443.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 296872900 + 47527236 = 17230^2 + 6894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×344400136² = 237222907353636992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 344400136.

It is not an unprimeable number, because it can be changed into a prime (344400131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21525001 + ... + 21525016.

Almost surely, 2^344400136 is an apocalyptic number.

It is an amenable number.

344400136 is a deficient number, since it is larger than the sum of its proper divisors (301350134).

344400136 is a wasteful number, since it uses less digits than its factorization.

344400136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43050023 (or 43050019 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 344400136 is about 18558.0207996435. The cubic root of 344400136 is about 700.9511803923.

Adding to 344400136 its reverse (631004443), we get a palindrome (975404579).

The spelling of 344400136 in words is "three hundred forty-four million, four hundred thousand, one hundred thirty-six".