30400000 has 120 divisors (see below), whose sum is σ = 79916760. Its totient is φ = 11520000.

The previous prime is 30399973. The next prime is 30400003. The reversal of 30400000 is 403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1599991 + ... + 1600009.

It is an arithmetic number, because the mean of its divisors is an integer number (665973).

Almost surely, 2^30400000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39958380).

30400000 is an abundant number, since it is smaller than the sum of its proper divisors (49516760).

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

30400000 is an frugal number, since it uses more digits than its factorization.

30400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 30400000 is about 5513.6195008361. The cubic root of 30400000 is about 312.0981501416.

Adding to 30400000 its reverse (403), we get a palindrome (30400403).

The spelling of 30400000 in words is "thirty million, four hundred thousand".