30701640 has 32 divisors (see below), whose sum is σ = 92105280. Its totient is φ = 8187072.

The previous prime is 30701621. The next prime is 30701641. The reversal of 30701640 is 4610703.

It is not an unprimeable number, because it can be changed into a prime (30701641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127804 + ... + 128043.

It is an arithmetic number, because the mean of its divisors is an integer number (2878290).

Almost surely, 2^30701640 is an apocalyptic number.

30701640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30701640 is an abundant number, since it is smaller than the sum of its proper divisors (61403640).

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

30701640 is a wasteful number, since it uses less digits than its factorization.

30701640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255861 (or 255857 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 30701640 is about 5540.9060630911. The cubic root of 30701640 is about 313.1270056565.

The spelling of 30701640 in words is "thirty million, seven hundred one thousand, six hundred forty".