30761840 has 40 divisors (see below), whose sum is σ = 75731760. Its totient is φ = 11580416.

The previous prime is 30761821. The next prime is 30761867. The reversal of 30761840 is 4816703.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9950 + ... + 12669.

It is an arithmetic number, because the mean of its divisors is an integer number (1893294).

Almost surely, 2^30761840 is an apocalyptic number.

It is an amenable number.

30761840 is an abundant number, since it is smaller than the sum of its proper divisors (44969920).

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

30761840 is a wasteful number, since it uses less digits than its factorization.

30761840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22649 (or 22643 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 30761840 is about 5546.3357273068. The cubic root of 30761840 is about 313.3315326087.

The spelling of 30761840 in words is "thirty million, seven hundred sixty-one thousand, eight hundred forty".