1144423731 has 16 divisors (see below), whose sum is σ = 1762535808. Its totient is φ = 652790400.

The previous prime is 1144423691. The next prime is 1144423739. The reversal of 1144423731 is 1373244411.

It is not a de Polignac number, because 1144423731 - 2⁶ = 1144423667 is a prime.

It is a super-2 number, since 2×1144423731² = 2619411352151920722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1144423739) 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 15 ways as a sum of consecutive naturals, for example, 1019425 + ... + 1020546.

It is an arithmetic number, because the mean of its divisors is an integer number (110158488).

Almost surely, 2^1144423731 is an apocalyptic number.

1144423731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1144423731 is a deficient number, since it is larger than the sum of its proper divisors (618112077).

1144423731 is a wasteful number, since it uses less digits than its factorization.

1144423731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040002.

The product of its digits is 8064, while the sum is 30.

The square root of 1144423731 is about 33829.3324054732. The cubic root of 1144423731 is about 1045.9934177802.

The spelling of 1144423731 in words is "one billion, one hundred forty-four million, four hundred twenty-three thousand, seven hundred thirty-one".