30400530 has 32 divisors (see below), whose sum is σ = 73263744. Its totient is φ = 8073216.

The previous prime is 30400529. The next prime is 30400537. The reversal of 30400530 is 3500403.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (30400537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5739 + ... + 9681.

It is an arithmetic number, because the mean of its divisors is an integer number (2289492).

Almost surely, 2^30400530 is an apocalyptic number.

30400530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30400530 is an abundant number, since it is smaller than the sum of its proper divisors (42863214).

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

30400530 is a wasteful number, since it uses less digits than its factorization.

30400530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 30400530 is about 5513.6675634282. The cubic root of 30400530 is about 312.0999638593.

Adding to 30400530 its reverse (3500403), we get a palindrome (33900933).

The spelling of 30400530 in words is "thirty million, four hundred thousand, five hundred thirty".