30999390 has 16 divisors (see below), whose sum is σ = 74398608. Its totient is φ = 8266496.

The previous prime is 30999383. The next prime is 30999391. The reversal of 30999390 is 9399903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30999391) 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 7 ways as a sum of consecutive naturals, for example, 516627 + ... + 516686.

It is an arithmetic number, because the mean of its divisors is an integer number (4649913).

Almost surely, 2^30999390 is an apocalyptic number.

30999390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30999390 is an abundant number, since it is smaller than the sum of its proper divisors (43399218).

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

30999390 is a wasteful number, since it uses less digits than its factorization.

30999390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033323.

The product of its (nonzero) digits is 59049, while the sum is 42.

The square root of 30999390 is about 5567.7095829434. The cubic root of 30999390 is about 314.1360047501.

It can be divided in two parts, 309 and 99390, that added together give a palindrome (99699).

The spelling of 30999390 in words is "thirty million, nine hundred ninety-nine thousand, three hundred ninety".