285720770 has 8 divisors (see below), whose sum is σ = 514297404. Its totient is φ = 114288304.

The previous prime is 285720739. The next prime is 285720779. The reversal of 285720770 is 77027582.

It can be written as a sum of positive squares in 2 ways, for example, as 263640169 + 22080601 = 16237^2 + 4699^2 .

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

It is not an unprimeable number, because it can be changed into a prime (285720779) 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, 14286029 + ... + 14286048.

Almost surely, 2^285720770 is an apocalyptic number.

285720770 is a deficient number, since it is larger than the sum of its proper divisors (228576634).

285720770 is a wasteful number, since it uses less digits than its factorization.

285720770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28572084.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 285720770 is about 16903.2769012402. The cubic root of 285720770 is about 658.6387385350.

The spelling of 285720770 in words is "two hundred eighty-five million, seven hundred twenty thousand, seven hundred seventy".