30040320 has 72 divisors (see below), whose sum is σ = 95953536. Its totient is φ = 8009728.

The previous prime is 30040267. The next prime is 30040363. The reversal of 30040320 is 2304003.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30040296 and 30040305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72 + ... + 7751.

It is an arithmetic number, because the mean of its divisors is an integer number (1332688).

Almost surely, 2^30040320 is an apocalyptic number.

30040320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30040320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47976768).

30040320 is an abundant number, since it is smaller than the sum of its proper divisors (65913216).

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

30040320 is an equidigital number, since it uses as much as digits as its factorization.

30040320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847 (or 7833 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 30040320 is about 5480.9050347548. The cubic root of 30040320 is about 310.8623922948.

Adding to 30040320 its reverse (2304003), we get a palindrome (32344323).

The spelling of 30040320 in words is "thirty million, forty thousand, three hundred twenty".