1440420520 has 64 divisors (see below), whose sum is σ = 4040668800. Its totient is φ = 448961280.

The previous prime is 1440420479. The next prime is 1440420529. The reversal of 1440420520 is 250240441.

It is a happy number.

It is a super-2 number, since 2×1440420520² = 4149622548874140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1440420491 and 1440420500.

It is not an unprimeable number, because it can be changed into a prime (1440420529) 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, 230755 + ... + 236914.

It is an arithmetic number, because the mean of its divisors is an integer number (63135450).

Almost surely, 2^1440420520 is an apocalyptic number.

1440420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440420520 is an abundant number, since it is smaller than the sum of its proper divisors (2600248280).

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

1440420520 is a wasteful number, since it uses less digits than its factorization.

1440420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467698 (or 467694 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1440420520 is about 37952.8723550669. The cubic root of 1440420520 is about 1129.3531474229.

Adding to 1440420520 its reverse (250240441), we get a palindrome (1690660961).

The spelling of 1440420520 in words is "one billion, four hundred forty million, four hundred twenty thousand, five hundred twenty".