30780873 has 12 divisors (see below), whose sum is σ = 45546228. Its totient is φ = 20019840.

The previous prime is 30780857. The next prime is 30780881. The reversal of 30780873 is 37808703.

It can be written as a sum of positive squares in 2 ways, for example, as 1750329 + 29030544 = 1323^2 + 5388^2 .

It is not a de Polignac number, because 30780873 - 2⁴ = 30780857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30780823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41340 + ... + 42077.

It is an arithmetic number, because the mean of its divisors is an integer number (3795519).

Almost surely, 2^30780873 is an apocalyptic number.

It is an amenable number.

30780873 is a deficient number, since it is larger than the sum of its proper divisors (14765355).

30780873 is a wasteful number, since it uses less digits than its factorization.

30780873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83464 (or 83461 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 30780873 is about 5548.0512795035. The cubic root of 30780873 is about 313.3961408977.

The spelling of 30780873 in words is "thirty million, seven hundred eighty thousand, eight hundred seventy-three".