30572740 has 24 divisors (see below), whose sum is σ = 70039872. Its totient is φ = 11117280.

The previous prime is 30572719. The next prime is 30572741. The reversal of 30572740 is 4727503.

It is a super-2 number, since 2×30572740² = 1869384862215200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30572699 and 30572708.

It is not an unprimeable number, because it can be changed into a prime (30572741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69264 + ... + 69703.

It is an arithmetic number, because the mean of its divisors is an integer number (2918328).

Almost surely, 2^30572740 is an apocalyptic number.

It is an amenable number.

30572740 is an abundant number, since it is smaller than the sum of its proper divisors (39467132).

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

30572740 is a wasteful number, since it uses less digits than its factorization.

30572740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138987 (or 138985 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 30572740 is about 5529.2621569247. The cubic root of 30572740 is about 312.6881725354.

The spelling of 30572740 in words is "thirty million, five hundred seventy-two thousand, seven hundred forty".