30142040 has 32 divisors (see below), whose sum is σ = 69266880. Its totient is φ = 11799552.

The previous prime is 30142039. The next prime is 30142043. The reversal of 30142040 is 4024103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142043) 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, 6137 + ... + 9896.

It is an arithmetic number, because the mean of its divisors is an integer number (2164590).

Almost surely, 2^30142040 is an apocalyptic number.

It is an amenable number.

30142040 is an abundant number, since it is smaller than the sum of its proper divisors (39124840).

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

30142040 is a wasteful number, since it uses less digits than its factorization.

30142040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16091 (or 16087 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 30142040 is about 5490.1766820386. The cubic root of 30142040 is about 311.2128690189.

Adding to 30142040 its reverse (4024103), we get a palindrome (34166143).

The spelling of 30142040 in words is "thirty million, one hundred forty-two thousand, forty".