30990036 has 72 divisors (see below), whose sum is σ = 90865600. Its totient is φ = 8046720.

The previous prime is 30990019. The next prime is 30990077. The reversal of 30990036 is 63009903.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30989985 and 30990012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8640 + ... + 11688.

Almost surely, 2^30990036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30990036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45432800).

30990036 is an abundant number, since it is smaller than the sum of its proper divisors (59875564).

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

30990036 is a wasteful number, since it uses less digits than its factorization.

30990036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3072 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 30990036 is about 5566.8694973028. The cubic root of 30990036 is about 314.1044049478.

Adding to 30990036 its reverse (63009903), we get a palindrome (93999939).

The spelling of 30990036 in words is "thirty million, nine hundred ninety thousand, thirty-six".