30765890 has 8 divisors (see below), whose sum is σ = 55378620. Its totient is φ = 12306352.

The previous prime is 30765863. The next prime is 30765893. The reversal of 30765890 is 9856703.

It can be written as a sum of positive squares in 2 ways, for example, as 29495761 + 1270129 = 5431^2 + 1127^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (30765893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538285 + ... + 1538304.

Almost surely, 2^30765890 is an apocalyptic number.

30765890 is a deficient number, since it is larger than the sum of its proper divisors (24612730).

30765890 is a wasteful number, since it uses less digits than its factorization.

30765890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076596.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 30765890 is about 5546.7008212089. The cubic root of 30765890 is about 313.3452827292.

The spelling of 30765890 in words is "thirty million, seven hundred sixty-five thousand, eight hundred ninety".