30748731 has 8 divisors (see below), whose sum is σ = 44152080. Its totient is φ = 18922272.

The previous prime is 30748717. The next prime is 30748759. The reversal of 30748731 is 13784703.

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

It is not a de Polignac number, because 30748731 - 2⁶ = 30748667 is a prime.

It is a super-2 number, since 2×30748731² = 1890968916220722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30748692 and 30748701.

It is not an unprimeable number, because it can be changed into a prime (30748031) 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, 394176 + ... + 394253.

It is an arithmetic number, because the mean of its divisors is an integer number (5519010).

Almost surely, 2^30748731 is an apocalyptic number.

30748731 is a deficient number, since it is larger than the sum of its proper divisors (13403349).

30748731 is a wasteful number, since it uses less digits than its factorization.

30748731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788445.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 30748731 is about 5545.1538301475. The cubic root of 30748731 is about 313.2870180776.

The spelling of 30748731 in words is "thirty million, seven hundred forty-eight thousand, seven hundred thirty-one".