1440636442 has 16 divisors (see below), whose sum is σ = 2470168512. Its totient is φ = 617289120.

The previous prime is 1440636413. The next prime is 1440636473. The reversal of 1440636442 is 2446360441.

It is a junction number, because it is equal to n+sod(n) for n = 1440636398 and 1440636407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100717 + ... + 114127.

It is an arithmetic number, because the mean of its divisors is an integer number (154385532).

Almost surely, 2^1440636442 is an apocalyptic number.

1440636442 is a deficient number, since it is larger than the sum of its proper divisors (1029532070).

1440636442 is a wasteful number, since it uses less digits than its factorization.

1440636442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21093.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 1440636442 is about 37955.7168553039. The cubic root of 1440636442 is about 1129.4095753903.

Adding to 1440636442 its reverse (2446360441), we get a palindrome (3886996883).

The spelling of 1440636442 in words is "one billion, four hundred forty million, six hundred thirty-six thousand, four hundred forty-two".