30878941 has 4 divisors (see below), whose sum is σ = 30905532. Its totient is φ = 30852352.

The previous prime is 30878923. The next prime is 30878951. The reversal of 30878941 is 14987803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3786916 + 27092025 = 1946^2 + 5205^2 .

It is a cyclic number.

It is not a de Polignac number, because 30878941 - 2¹¹ = 30876893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30878894 and 30878903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878951) 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, 11470 + ... + 13903.

It is an arithmetic number, because the mean of its divisors is an integer number (7726383).

Almost surely, 2^30878941 is an apocalyptic number.

It is an amenable number.

30878941 is a deficient number, since it is larger than the sum of its proper divisors (26591).

30878941 is a wasteful number, since it uses less digits than its factorization.

30878941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26590.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 30878941 is about 5556.8823093530. The cubic root of 30878941 is about 313.7286152311.

The spelling of 30878941 in words is "thirty million, eight hundred seventy-eight thousand, nine hundred forty-one".