805723428 has 24 divisors (see below), whose sum is σ = 1881513760. Its totient is φ = 268361280.

The previous prime is 805723427. The next prime is 805723439. The reversal of 805723428 is 824327508.

It is not an unprimeable number, because it can be changed into a prime (805723421) 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 7 ways as a sum of consecutive naturals, for example, 10513 + ... + 41496.

Almost surely, 2^805723428 is an apocalyptic number.

It is an amenable number.

805723428 is an abundant number, since it is smaller than the sum of its proper divisors (1075790332).

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

805723428 is a wasteful number, since it uses less digits than its factorization.

805723428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53307 (or 53305 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 805723428 is about 28385.2677986310. The cubic root of 805723428 is about 930.5263248062.

The spelling of 805723428 in words is "eight hundred five million, seven hundred twenty-three thousand, four hundred twenty-eight".