30408042 has 16 divisors (see below), whose sum is σ = 69504192. Its totient is φ = 8688000.

The previous prime is 30408041. The next prime is 30408071. The reversal of 30408042 is 24080403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (30408041) 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, 361959 + ... + 362042.

It is an arithmetic number, because the mean of its divisors is an integer number (4344012).

Almost surely, 2^30408042 is an apocalyptic number.

30408042 is an abundant number, since it is smaller than the sum of its proper divisors (39096150).

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

30408042 is a wasteful number, since it uses less digits than its factorization.

30408042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724013.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30408042 is about 5514.3487376117. The cubic root of 30408042 is about 312.1256684753.

Adding to 30408042 its reverse (24080403), we get a palindrome (54488445).

The spelling of 30408042 in words is "thirty million, four hundred eight thousand, forty-two".