30121436 has 24 divisors (see below), whose sum is σ = 53760000. Its totient is φ = 14764464.

The previous prime is 30121411. The next prime is 30121453. The reversal of 30121436 is 63412103.

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, 62645 + ... + 63123.

It is an arithmetic number, because the mean of its divisors is an integer number (2240000).

Almost surely, 2^30121436 is an apocalyptic number.

It is an amenable number.

30121436 is a deficient number, since it is larger than the sum of its proper divisors (23638564).

30121436 is a wasteful number, since it uses less digits than its factorization.

30121436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30121436 is about 5488.2999189184. The cubic root of 30121436 is about 311.1419415970.

Adding to 30121436 its reverse (63412103), we get a palindrome (93533539).

The spelling of 30121436 in words is "thirty million, one hundred twenty-one thousand, four hundred thirty-six".