30401881 has 4 divisors (see below), whose sum is σ = 32002000. Its totient is φ = 28801764.

The previous prime is 30401867. The next prime is 30401893. The reversal of 30401881 is 18810403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30401881 - 2⁹ = 30401369 is a prime.

It is a super-2 number, since 2×30401881² = 1848548736676322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30401801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800031 + ... + 800068.

It is an arithmetic number, because the mean of its divisors is an integer number (8000500).

Almost surely, 2^30401881 is an apocalyptic number.

It is an amenable number.

30401881 is a deficient number, since it is larger than the sum of its proper divisors (1600119).

30401881 is a wasteful number, since it uses less digits than its factorization.

30401881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600118.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 30401881 is about 5513.7900758009. The cubic root of 30401881 is about 312.1045870332.

The spelling of 30401881 in words is "thirty million, four hundred one thousand, eight hundred eighty-one".