1444684357 has 4 divisors (see below), whose sum is σ = 1465032096. Its totient is φ = 1424336620.

The previous prime is 1444684343. The next prime is 1444684369. The reversal of 1444684357 is 7534864441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7534864441 = 13 ⋅579604957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444684357 is a prime.

It is a super-2 number, since 2×1444684357² = 4174225782721006898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444684457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10173763 + ... + 10173904.

It is an arithmetic number, because the mean of its divisors is an integer number (366258024).

Almost surely, 2^1444684357 is an apocalyptic number.

It is an amenable number.

1444684357 is a deficient number, since it is larger than the sum of its proper divisors (20347739).

1444684357 is an equidigital number, since it uses as much as digits as its factorization.

1444684357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20347738.

The product of its digits is 1290240, while the sum is 46.

The square root of 1444684357 is about 38009.0036307189. The cubic root of 1444684357 is about 1130.4663950430.

The spelling of 1444684357 in words is "one billion, four hundred forty-four million, six hundred eighty-four thousand, three hundred fifty-seven".