1240677440 has 56 divisors (see below), whose sum is σ = 2969361600. Its totient is φ = 493751808.

The previous prime is 1240677407. The next prime is 1240677463. The reversal of 1240677440 is 447760421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240677440.

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, 53939 + ... + 73421.

Almost surely, 2^1240677440 is an apocalyptic number.

1240677440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240677440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484680800).

1240677440 is an abundant number, since it is smaller than the sum of its proper divisors (1728684160).

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

1240677440 is a wasteful number, since it uses less digits than its factorization.

1240677440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19699 (or 19689 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 1240677440 is about 35223.2514115321. The cubic root of 1240677440 is about 1074.5326802384.

The spelling of 1240677440 in words is "one billion, two hundred forty million, six hundred seventy-seven thousand, four hundred forty".