30268821 has 8 divisors (see below), whose sum is σ = 44027424. Its totient is φ = 18344720.

The previous prime is 30268817. The next prime is 30268859. The reversal of 30268821 is 12886203.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30268821 - 2² = 30268817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30268801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458586 + ... + 458651.

It is an arithmetic number, because the mean of its divisors is an integer number (5503428).

Almost surely, 2^30268821 is an apocalyptic number.

It is an amenable number.

30268821 is a deficient number, since it is larger than the sum of its proper divisors (13758603).

30268821 is a wasteful number, since it uses less digits than its factorization.

30268821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917251.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 30268821 is about 5501.7107339445. The cubic root of 30268821 is about 311.6485914511.

The spelling of 30268821 in words is "thirty million, two hundred sixty-eight thousand, eight hundred twenty-one".