815420734 has 8 divisors (see below), whose sum is σ = 1225147968. Its totient is φ = 407038080.

The previous prime is 815420677. The next prime is 815420737. The reversal of 815420734 is 437024518.

815420734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 815420734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815420737) 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, 334627 + ... + 337054.

It is an arithmetic number, because the mean of its divisors is an integer number (153143496).

Almost surely, 2^815420734 is an apocalyptic number.

815420734 is a deficient number, since it is larger than the sum of its proper divisors (409727234).

815420734 is a wasteful number, since it uses less digits than its factorization.

815420734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672290.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 815420734 is about 28555.5727310800. The cubic root of 815420734 is about 934.2445723160.

The spelling of 815420734 in words is "eight hundred fifteen million, four hundred twenty thousand, seven hundred thirty-four".