30841820 has 12 divisors (see below), whose sum is σ = 64767864. Its totient is φ = 12336720.

The previous prime is 30841817. The next prime is 30841847. The reversal of 30841820 is 2814803.

It is a self number, because there is not a number n which added to its sum of digits gives 30841820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771026 + ... + 771065.

It is an arithmetic number, because the mean of its divisors is an integer number (5397322).

Almost surely, 2^30841820 is an apocalyptic number.

It is an amenable number.

30841820 is an abundant number, since it is smaller than the sum of its proper divisors (33926044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30841820 is a wasteful number, since it uses less digits than its factorization.

30841820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542100 (or 1542098 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 30841820 is about 5553.5412125958. The cubic root of 30841820 is about 313.6028489390.

The spelling of 30841820 in words is "thirty million, eight hundred forty-one thousand, eight hundred twenty".