1440623977 has 4 divisors (see below), whose sum is σ = 1551441220. Its totient is φ = 1329806736.

The previous prime is 1440623963. The next prime is 1440623983. The reversal of 1440623977 is 7793260441.

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 932752681 + 507871296 = 30541^2 + 22536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440623977 - 2¹¹ = 1440621929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440623957) 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, 55408602 + ... + 55408627.

It is an arithmetic number, because the mean of its divisors is an integer number (387860305).

Almost surely, 2^1440623977 is an apocalyptic number.

It is an amenable number.

1440623977 is a deficient number, since it is larger than the sum of its proper divisors (110817243).

1440623977 is a wasteful number, since it uses less digits than its factorization.

1440623977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110817242.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 1440623977 is about 37955.5526504357. The cubic root of 1440623977 is about 1129.4063180034.

It can be divided in two parts, 14406 and 23977, that added together give a palindrome (38383).

The spelling of 1440623977 in words is "one billion, four hundred forty million, six hundred twenty-three thousand, nine hundred seventy-seven".