1240664402 has 8 divisors (see below), whose sum is σ = 1861282800. Its totient is φ = 620236804.

The previous prime is 1240664401. The next prime is 1240664407. The reversal of 1240664402 is 2044660421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1240664401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30152 + ... + 58227.

It is an arithmetic number, because the mean of its divisors is an integer number (232660350).

Almost surely, 2^1240664402 is an apocalyptic number.

1240664402 is a deficient number, since it is larger than the sum of its proper divisors (620618398).

1240664402 is an equidigital number, since it uses as much as digits as its factorization.

1240664402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95400.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1240664402 is about 35223.0663344349. The cubic root of 1240664402 is about 1074.5289162179.

The spelling of 1240664402 in words is "one billion, two hundred forty million, six hundred sixty-four thousand, four hundred two".