785321090 has 8 divisors (see below), whose sum is σ = 1413577980. Its totient is φ = 314128432.

The previous prime is 785321077. The next prime is 785321099. The reversal of 785321090 is 90123587.

It can be written as a sum of positive squares in 2 ways, for example, as 754106521 + 31214569 = 27461^2 + 5587^2 .

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 785321090.

It is not an unprimeable number, because it can be changed into a prime (785321099) 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, 39266045 + ... + 39266064.

Almost surely, 2^785321090 is an apocalyptic number.

785321090 is a deficient number, since it is larger than the sum of its proper divisors (628256890).

785321090 is a wasteful number, since it uses less digits than its factorization.

785321090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78532116.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 785321090 is about 28023.5809631817. The cubic root of 785321090 is about 922.6048930503.

The spelling of 785321090 in words is "seven hundred eighty-five million, three hundred twenty-one thousand, ninety".