1240403444 has 36 divisors (see below), whose sum is σ = 2559727044. Its totient is φ = 524313216.

The previous prime is 1240403443. The next prime is 1240403447. The reversal of 1240403444 is 4443040421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 732351844 + 508051600 = 27062^2 + 22540^2 .

It is a super-2 number, since 2×1240403444² = 3077201407774122272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240403443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29039 + ... + 57654.

It is an arithmetic number, because the mean of its divisors is an integer number (71103529).

Almost surely, 2^1240403444 is an apocalyptic number.

1240403444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1240403444 is an abundant number, since it is smaller than the sum of its proper divisors (1319323600).

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

1240403444 is a wasteful number, since it uses less digits than its factorization.

1240403444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86784 (or 86775 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1240403444 is about 35219.3617772952. The cubic root of 1240403444 is about 1074.4535730983.

Adding to 1240403444 its reverse (4443040421), we get a palindrome (5683443865).

The spelling of 1240403444 in words is "one billion, two hundred forty million, four hundred three thousand, four hundred forty-four".