30878636 has 12 divisors (see below), whose sum is σ = 54200328. Its totient is φ = 15392832.

The previous prime is 30878633. The next prime is 30878641. The reversal of 30878636 is 63687803.

It is a super-2 number, since 2×30878636² = 1906980322440992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30878593 and 30878602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10106 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (4516694).

Almost surely, 2^30878636 is an apocalyptic number.

It is an amenable number.

30878636 is a deficient number, since it is larger than the sum of its proper divisors (23321692).

30878636 is a wasteful number, since it uses less digits than its factorization.

30878636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23248 (or 23246 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 30878636 is about 5556.8548658391. The cubic root of 30878636 is about 313.7275822991.

The spelling of 30878636 in words is "thirty million, eight hundred seventy-eight thousand, six hundred thirty-six".