30712872 has 16 divisors (see below), whose sum is σ = 76782240. Its totient is φ = 10237616.

The previous prime is 30712861. The next prime is 30712883. The reversal of 30712872 is 27821703.

It is an interprime number because it is at equal distance from previous prime (30712861) and next prime (30712883).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639828 + ... + 639875.

It is an arithmetic number, because the mean of its divisors is an integer number (4798890).

Almost surely, 2^30712872 is an apocalyptic number.

It is an amenable number.

30712872 is an abundant number, since it is smaller than the sum of its proper divisors (46069368).

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

30712872 is a wasteful number, since it uses less digits than its factorization.

30712872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279712 (or 1279708 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 30712872 is about 5541.9195230534. The cubic root of 30712872 is about 313.1651861762.

The spelling of 30712872 in words is "thirty million, seven hundred twelve thousand, eight hundred seventy-two".