742906806 has 8 divisors (see below), whose sum is σ = 1485813624. Its totient is φ = 247635600.

The previous prime is 742906799. The next prime is 742906811. The reversal of 742906806 is 608609247.

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

742906806 is an admirable number.

It is a super-2 number, since 2×742906806² = 1103821044802243272, which contains 22 as substring.

It is a congruent number.

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, 61908895 + ... + 61908906.

It is an arithmetic number, because the mean of its divisors is an integer number (185726703).

Almost surely, 2^742906806 is an apocalyptic number.

742906806 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.

742906806 is a wasteful number, since it uses less digits than its factorization.

742906806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123817806.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 742906806 is about 27256.3168091362. The cubic root of 742906806 is about 905.6869547932.

The spelling of 742906806 in words is "seven hundred forty-two million, nine hundred six thousand, eight hundred six".