1344405540 has 24 divisors (see below), whose sum is σ = 3764335680. Its totient is φ = 358508128.

The previous prime is 1344405533. The next prime is 1344405571. The reversal of 1344405540 is 455044431.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1344405498 and 1344405507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11203320 + ... + 11203439.

It is an arithmetic number, because the mean of its divisors is an integer number (156847320).

Almost surely, 2^1344405540 is an apocalyptic number.

1344405540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1344405540 is an abundant number, since it is smaller than the sum of its proper divisors (2419930140).

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

1344405540 is a wasteful number, since it uses less digits than its factorization.

1344405540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22406771 (or 22406769 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1344405540 is about 36666.1361476772. The cubic root of 1344405540 is about 1103.6806568218.

Adding to 1344405540 its reverse (455044431), we get a palindrome (1799449971).

The spelling of 1344405540 in words is "one billion, three hundred forty-four million, four hundred five thousand, five hundred forty".