1405244240 has 40 divisors (see below), whose sum is σ = 3269978208. Its totient is φ = 561618560.

The previous prime is 1405244231. The next prime is 1405244261. The reversal of 1405244240 is 424425041.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1405244240² = 3949422748106355200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95795 + ... + 109485.

Almost surely, 2^1405244240 is an apocalyptic number.

1405244240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405244240 is an abundant number, since it is smaller than the sum of its proper divisors (1864733968).

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

1405244240 is a wasteful number, since it uses less digits than its factorization.

1405244240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14987 (or 14981 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1405244240 is about 37486.5874680532. The cubic root of 1405244240 is about 1120.0840285595.

Adding to 1405244240 its reverse (424425041), we get a palindrome (1829669281).

The spelling of 1405244240 in words is "one billion, four hundred five million, two hundred forty-four thousand, two hundred forty".