305744331640 has 32 divisors (see below), whose sum is σ = 750463360560. Its totient is φ = 111179756800.

The previous prime is 305744331617. The next prime is 305744331647. The reversal of 305744331640 is 46133447503.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 305744331593 and 305744331602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305744331647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347436301 + ... + 347437180.

Almost surely, 2^305744331640 is an apocalyptic number.

It is an amenable number.

305744331640 is an abundant number, since it is smaller than the sum of its proper divisors (444719028920).

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

305744331640 is a wasteful number, since it uses less digits than its factorization.

305744331640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694873503 (or 694873499 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 305744331640 in words is "three hundred five billion, seven hundred forty-four million, three hundred thirty-one thousand, six hundred forty".