742129856 has 28 divisors (see below), whose sum is σ = 1585947552. Its totient is φ = 342521088.

The previous prime is 742129811. The next prime is 742129877. The reversal of 742129856 is 658921247.

It is a happy number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445160 + ... + 446823.

It is an arithmetic number, because the mean of its divisors is an integer number (56640984).

Almost surely, 2^742129856 is an apocalyptic number.

It is an amenable number.

742129856 is an abundant number, since it is smaller than the sum of its proper divisors (843817696).

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

742129856 is a wasteful number, since it uses less digits than its factorization.

742129856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892008 (or 891998 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 742129856 is about 27242.0604213411. The cubic root of 742129856 is about 905.3711148509.

The spelling of 742129856 in words is "seven hundred forty-two million, one hundred twenty-nine thousand, eight hundred fifty-six".