30863925 has 36 divisors (see below), whose sum is σ = 58539780. Its totient is φ = 15490560.

The previous prime is 30863909. The next prime is 30863929. The reversal of 30863925 is 52936803.

It can be written as a sum of positive squares in 6 ways, for example, as 3896676 + 26967249 = 1974^2 + 5193^2 .

It is not a de Polignac number, because 30863925 - 2⁴ = 30863909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30863925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30863929) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 210 + ... + 7859.

It is an arithmetic number, because the mean of its divisors is an integer number (1626105).

Almost surely, 2^30863925 is an apocalyptic number.

It is an amenable number.

30863925 is a deficient number, since it is larger than the sum of its proper divisors (27675855).

30863925 is a wasteful number, since it uses less digits than its factorization.

30863925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102 (or 8094 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 30863925 is about 5555.5310277236. The cubic root of 30863925 is about 313.6777530301.

It can be divided in two parts, 30 and 863925, that added together give a triangular number (863955 = T₁₃₁₄).

The spelling of 30863925 in words is "thirty million, eight hundred sixty-three thousand, nine hundred twenty-five".