742643394 has 8 divisors (see below), whose sum is σ = 1485286800. Its totient is φ = 247547796.

The previous prime is 742643383. The next prime is 742643399. The reversal of 742643394 is 493346247.

It is a happy number.

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

742643394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (742643399) 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, 61886944 + ... + 61886955.

It is an arithmetic number, because the mean of its divisors is an integer number (185660850).

Almost surely, 2^742643394 is an apocalyptic number.

742643394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

742643394 is a wasteful number, since it uses less digits than its factorization.

742643394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123773904.

The product of its digits is 435456, while the sum is 42.

The square root of 742643394 is about 27251.4842531558. The cubic root of 742643394 is about 905.5798991876.

The spelling of 742643394 in words is "seven hundred forty-two million, six hundred forty-three thousand, three hundred ninety-four".