642737344 has 14 divisors (see below), whose sum is σ = 1275432044. Its totient is φ = 321368640.

The previous prime is 642737341. The next prime is 642737371. The reversal of 642737344 is 443737246.

It is a super-2 number, since 2×642737344² = 826222586744348672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642737297 and 642737306.

It is not an unprimeable number, because it can be changed into a prime (642737341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021322 + ... + 5021449.

Almost surely, 2^642737344 is an apocalyptic number.

642737344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

642737344 is a deficient number, since it is larger than the sum of its proper divisors (632694700).

642737344 is a wasteful number, since it uses less digits than its factorization.

642737344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10042783 (or 10042773 counting only the distinct ones).

The product of its digits is 338688, while the sum is 40.

The square root of 642737344 is about 25352.2650664591. The cubic root of 642737344 is about 863.0007595189. Note that the first 3 decimals are identical.

It can be divided in two parts, 64273 and 7344, that added together give a palindrome (71617).

The spelling of 642737344 in words is "six hundred forty-two million, seven hundred thirty-seven thousand, three hundred forty-four".