1409489440 has 48 divisors (see below), whose sum is σ = 3367367640. Its totient is φ = 557455360.

The previous prime is 1409489437. The next prime is 1409489449. The reversal of 1409489440 is 449849041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 559417104 + 850072336 = 23652^2 + 29156^2 .

It is not an unprimeable number, because it can be changed into a prime (1409489449) 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, 35251 + ... + 63730.

Almost surely, 2^1409489440 is an apocalyptic number.

1409489440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1409489440 is an abundant number, since it is smaller than the sum of its proper divisors (1957878200).

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

1409489440 is an equidigital number, since it uses as much as digits as its factorization.

1409489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99085 (or 99077 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1409489440 is about 37543.1676873436. The cubic root of 1409489440 is about 1121.2108078969.

The spelling of 1409489440 in words is "one billion, four hundred nine million, four hundred eighty-nine thousand, four hundred forty".