30390042 has 16 divisors (see below), whose sum is σ = 60917472. Its totient is φ = 10107120.

The previous prime is 30390011. The next prime is 30390091. The reversal of 30390042 is 24009303.

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, 2728 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (3807342).

Almost surely, 2^30390042 is an apocalyptic number.

30390042 is an abundant number, since it is smaller than the sum of its proper divisors (30527430).

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

30390042 is a wasteful number, since it uses less digits than its factorization.

30390042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11453.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 30390042 is about 5512.7163903107. The cubic root of 30390042 is about 312.0640688610.

Adding to 30390042 its reverse (24009303), we get a palindrome (54399345).

The spelling of 30390042 in words is "thirty million, three hundred ninety thousand, forty-two".