30881742 has 8 divisors (see below), whose sum is σ = 61763496. Its totient is φ = 10293912.

The previous prime is 30881729. The next prime is 30881759. The reversal of 30881742 is 24718803.

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

30881742 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 2573473 + ... + 2573484.

It is an arithmetic number, because the mean of its divisors is an integer number (7720437).

Almost surely, 2^30881742 is an apocalyptic number.

30881742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30881742 is a wasteful number, since it uses less digits than its factorization.

30881742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146962.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 30881742 is about 5557.1343334492. The cubic root of 30881742 is about 313.7381009545.

The spelling of 30881742 in words is "thirty million, eight hundred eighty-one thousand, seven hundred forty-two".