1240345408 has 28 divisors (see below), whose sum is σ = 2477629792. Its totient is φ = 616060800.

The previous prime is 1240345361. The next prime is 1240345411. The reversal of 1240345408 is 8045430421.

It is a super-2 number, since 2×1240345408² = 3076913462293372928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1240345408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54510 + ... + 73837.

Almost surely, 2^1240345408 is an apocalyptic number.

It is an amenable number.

1240345408 is a deficient number, since it is larger than the sum of its proper divisors (1237284384).

1240345408 is a wasteful number, since it uses less digits than its factorization.

1240345408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128510 (or 128500 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 1240345408 is about 35218.5378458561. The cubic root of 1240345408 is about 1074.4368156579.

Adding to 1240345408 its reverse (8045430421), we get a palindrome (9285775829).

The spelling of 1240345408 in words is "one billion, two hundred forty million, three hundred forty-five thousand, four hundred eight".