742720418 has 8 divisors (see below), whose sum is σ = 1215360720. Its totient is φ = 337600180.

The previous prime is 742720417. The next prime is 742720427. The reversal of 742720418 is 814027247.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (742720417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16879988 + ... + 16880031.

It is an arithmetic number, because the mean of its divisors is an integer number (151920090).

Almost surely, 2^742720418 is an apocalyptic number.

742720418 is a deficient number, since it is larger than the sum of its proper divisors (472640302).

742720418 is a wasteful number, since it uses less digits than its factorization.

742720418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33760032.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 742720418 is about 27252.8974239438. The cubic root of 742720418 is about 905.6112058127.

The spelling of 742720418 in words is "seven hundred forty-two million, seven hundred twenty thousand, four hundred eighteen".