30906740 has 24 divisors (see below), whose sum is σ = 65796360. Its totient is φ = 12192768.

The previous prime is 30906719. The next prime is 30906767. The reversal of 30906740 is 4760903.

It can be written as a sum of positive squares in 4 ways, for example, as 11792356 + 19114384 = 3434^2 + 4372^2 .

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, 9125 + ... + 12044.

It is an arithmetic number, because the mean of its divisors is an integer number (2741515).

Almost surely, 2^30906740 is an apocalyptic number.

It is an amenable number.

30906740 is an abundant number, since it is smaller than the sum of its proper divisors (34889620).

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

30906740 is a wasteful number, since it uses less digits than its factorization.

30906740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251 (or 21249 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 30906740 is about 5559.3830592971. The cubic root of 30906740 is about 313.8227325124.

The spelling of 30906740 in words is "thirty million, nine hundred six thousand, seven hundred forty".