1440428718 has 16 divisors (see below), whose sum is σ = 2898533376. Its totient is φ = 477196920.

The previous prime is 1440428701. The next prime is 1440428719. The reversal of 1440428718 is 8178240441.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440428719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735438 + ... + 737393.

It is an arithmetic number, because the mean of its divisors is an integer number (181158336).

Almost surely, 2^1440428718 is an apocalyptic number.

1440428718 is an abundant number, since it is smaller than the sum of its proper divisors (1458104658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440428718 is a wasteful number, since it uses less digits than its factorization.

1440428718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472999.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 1440428718 is about 37952.9803572789. The cubic root of 1440428718 is about 1129.3552899499.

The spelling of 1440428718 in words is "one billion, four hundred forty million, four hundred twenty-eight thousand, seven hundred eighteen".