1440726172 has 6 divisors (see below), whose sum is σ = 2521270808. Its totient is φ = 720363084.

The previous prime is 1440726169. The next prime is 1440726173. The reversal of 1440726172 is 2716270441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440726173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180090768 + ... + 180090775.

Almost surely, 2^1440726172 is an apocalyptic number.

It is an amenable number.

1440726172 is a deficient number, since it is larger than the sum of its proper divisors (1080544636).

1440726172 is a wasteful number, since it uses less digits than its factorization.

1440726172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360181547 (or 360181545 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 1440726172 is about 37956.8988722735. The cubic root of 1440726172 is about 1129.4330233180.

The spelling of 1440726172 in words is "one billion, four hundred forty million, seven hundred twenty-six thousand, one hundred seventy-two".