30540731 has 8 divisors (see below), whose sum is σ = 32998224. Its totient is φ = 28098720.

The previous prime is 30540703. The next prime is 30540737. The reversal of 30540731 is 13704503.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30540731 is a prime.

It is a super-2 number, since 2×30540731² = 1865472500028722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30540697 and 30540706.

It is not an unprimeable number, because it can be changed into a prime (30540737) by changing a digit.

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, 416 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (4124778).

Almost surely, 2^30540731 is an apocalyptic number.

30540731 is a deficient number, since it is larger than the sum of its proper divisors (2457493).

30540731 is a wasteful number, since it uses less digits than its factorization.

30540731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 30540731 is about 5526.3668897387. The cubic root of 30540731 is about 312.5790085028.

The spelling of 30540731 in words is "thirty million, five hundred forty thousand, seven hundred thirty-one".