30990045 has 48 divisors (see below), whose sum is σ = 53766720. Its totient is φ = 15234048.

The previous prime is 30990019. The next prime is 30990077. The reversal of 30990045 is 54009903.

It is not a de Polignac number, because 30990045 - 2²³ = 22601437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30989994 and 30990021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 319437 + ... + 319533.

It is an arithmetic number, because the mean of its divisors is an integer number (1120140).

Almost surely, 2^30990045 is an apocalyptic number.

It is an amenable number.

30990045 is a deficient number, since it is larger than the sum of its proper divisors (22776675).

30990045 is a wasteful number, since it uses less digits than its factorization.

30990045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 30990045 is about 5566.8703056565. The cubic root of 30990045 is about 314.1044353547.

Adding to 30990045 its reverse (54009903), we get a palindrome (84999948).

The spelling of 30990045 in words is "thirty million, nine hundred ninety thousand, forty-five".