1440014520 has 128 divisors (see below), whose sum is σ = 4970327040. Its totient is φ = 326937600.

The previous prime is 1440014497. The next prime is 1440014549. The reversal of 1440014520 is 254100441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121164 + ... + 132516.

It is an arithmetic number, because the mean of its divisors is an integer number (38830680).

Almost surely, 2^1440014520 is an apocalyptic number.

1440014520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440014520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485163520).

1440014520 is an abundant number, since it is smaller than the sum of its proper divisors (3530312520).

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

1440014520 is a wasteful number, since it uses less digits than its factorization.

1440014520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11525 (or 11521 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1440014520 is about 37947.5232393367. The cubic root of 1440014520 is about 1129.2470301565.

Adding to 1440014520 its reverse (254100441), we get a palindrome (1694114961).

It can be divided in two parts, 14400 and 14520, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 1440014520 in words is "one billion, four hundred forty million, fourteen thousand, five hundred twenty".