30487820 has 24 divisors (see below), whose sum is σ = 69845328. Its totient is φ = 11086400.

The previous prime is 30487813. The next prime is 30487829. The reversal of 30487820 is 2878403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30487829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69071 + ... + 69510.

It is an arithmetic number, because the mean of its divisors is an integer number (2910222).

Almost surely, 2^30487820 is an apocalyptic number.

It is an amenable number.

30487820 is an abundant number, since it is smaller than the sum of its proper divisors (39357508).

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

30487820 is a wasteful number, since it uses less digits than its factorization.

30487820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138601 (or 138599 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 30487820 is about 5521.5776730931. The cubic root of 30487820 is about 312.3983925666.

The spelling of 30487820 in words is "thirty million, four hundred eighty-seven thousand, eight hundred twenty".