1440146865 has 16 divisors (see below), whose sum is σ = 2342010816. Its totient is φ = 755486400.

The previous prime is 1440146839. The next prime is 1440146867. The reversal of 1440146865 is 5686410441.

It is not a de Polignac number, because 1440146865 - 2⁶ = 1440146801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440146867) 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, 786051 + ... + 787880.

It is an arithmetic number, because the mean of its divisors is an integer number (146375676).

Almost surely, 2^1440146865 is an apocalyptic number.

1440146865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440146865 is a deficient number, since it is larger than the sum of its proper divisors (901863951).

1440146865 is a wasteful number, since it uses less digits than its factorization.

1440146865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574000.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 1440146865 is about 37949.2669889683. The cubic root of 1440146865 is about 1129.2816237012.

The spelling of 1440146865 in words is "one billion, four hundred forty million, one hundred forty-six thousand, eight hundred sixty-five".