1440093157 has 4 divisors (see below), whose sum is σ = 1467264780. Its totient is φ = 1412921536.

The previous prime is 1440093139. The next prime is 1440093167. The reversal of 1440093157 is 7513900441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1086427521 + 353665636 = 32961^2 + 18806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440093157 - 2⁷ = 1440093029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440093167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13585732 + ... + 13585837.

It is an arithmetic number, because the mean of its divisors is an integer number (366816195).

Almost surely, 2^1440093157 is an apocalyptic number.

It is an amenable number.

1440093157 is a deficient number, since it is larger than the sum of its proper divisors (27171623).

1440093157 is an equidigital number, since it uses as much as digits as its factorization.

1440093157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27171622.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1440093157 is about 37948.5593534195. The cubic root of 1440093157 is about 1129.2675852692.

Adding to 1440093157 its reverse (7513900441), we get a palindrome (8953993598).

The spelling of 1440093157 in words is "one billion, four hundred forty million, ninety-three thousand, one hundred fifty-seven".