1440261641 has 16 divisors (see below), whose sum is σ = 1876904064. Its totient is φ = 1072514304.

The previous prime is 1440261577. The next prime is 1440261649. The reversal of 1440261641 is 1461620441.

It is a cyclic number.

It is not a de Polignac number, because 1440261641 - 2⁶ = 1440261577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440261649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463955 + ... + 467048.

It is an arithmetic number, because the mean of its divisors is an integer number (117306504).

Almost surely, 2^1440261641 is an apocalyptic number.

It is an amenable number.

1440261641 is a deficient number, since it is larger than the sum of its proper divisors (436642423).

1440261641 is a wasteful number, since it uses less digits than its factorization.

1440261641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931040.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1440261641 is about 37950.7791883118. The cubic root of 1440261641 is about 1129.3116231842.

The spelling of 1440261641 in words is "one billion, four hundred forty million, two hundred sixty-one thousand, six hundred forty-one".