30505436 has 24 divisors (see below), whose sum is σ = 57840384. Its totient is φ = 13993920.

The previous prime is 30505421. The next prime is 30505481. The reversal of 30505436 is 63450503.

It is a Harshad number since it is a multiple of its sum of digits (26).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7301 + ... + 10691.

It is an arithmetic number, because the mean of its divisors is an integer number (2410016).

Almost surely, 2^30505436 is an apocalyptic number.

It is an amenable number.

30505436 is a deficient number, since it is larger than the sum of its proper divisors (27334948).

30505436 is a wasteful number, since it uses less digits than its factorization.

30505436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 30505436 is about 5523.1726389821. The cubic root of 30505436 is about 312.4585493822.

Adding to 30505436 its reverse (63450503), we get a palindrome (93955939).

The spelling of 30505436 in words is "thirty million, five hundred five thousand, four hundred thirty-six".