30381500 has 24 divisors (see below), whose sum is σ = 66354288. Its totient is φ = 12152400.

The previous prime is 30381493. The next prime is 30381503. The reversal of 30381500 is 518303.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29882 + ... + 30881.

It is an arithmetic number, because the mean of its divisors is an integer number (2764762).

Almost surely, 2^30381500 is an apocalyptic number.

It is an amenable number.

30381500 is an abundant number, since it is smaller than the sum of its proper divisors (35972788).

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

30381500 is a wasteful number, since it uses less digits than its factorization.

30381500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60782 (or 60770 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 30381500 is about 5511.9415816933. The cubic root of 30381500 is about 312.0348279113.

Adding to 30381500 its reverse (518303), we get a palindrome (30899803).

The spelling of 30381500 in words is "thirty million, three hundred eighty-one thousand, five hundred".