1240436673 has 40 divisors (see below), whose sum is σ = 2169404160. Its totient is φ = 691519680.

The previous prime is 1240436663. The next prime is 1240436711. The reversal of 1240436673 is 3766340421.

It is a happy number.

It is not a de Polignac number, because 1240436673 - 2¹² = 1240432577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240436623) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3433 + ... + 49926.

It is an arithmetic number, because the mean of its divisors is an integer number (54235104).

Almost surely, 2^1240436673 is an apocalyptic number.

It is an amenable number.

1240436673 is a deficient number, since it is larger than the sum of its proper divisors (928967487).

1240436673 is an equidigital number, since it uses as much as digits as its factorization.

1240436673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53419 (or 53410 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 1240436673 is about 35219.8335174941. The cubic root of 1240436673 is about 1074.4631674764.

The spelling of 1240436673 in words is "one billion, two hundred forty million, four hundred thirty-six thousand, six hundred seventy-three".