30143740 has 48 divisors (see below), whose sum is σ = 69529824. Its totient is φ = 10886400.

The previous prime is 30143723. The next prime is 30143741. The reversal of 30143740 is 4734103.

It is a happy number.

It is a super-2 number, since 2×30143740² = 1817290122375200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30143741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39442 + ... + 40198.

It is an arithmetic number, because the mean of its divisors is an integer number (1448538).

Almost surely, 2^30143740 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 30143740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34764912).

30143740 is an abundant number, since it is smaller than the sum of its proper divisors (39386084).

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

30143740 is a wasteful number, since it uses less digits than its factorization.

30143740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 30143740 is about 5490.3315018312. The cubic root of 30143740 is about 311.2187196728.

Adding to 30143740 its reverse (4734103), we get a palindrome (34877843).

The spelling of 30143740 in words is "thirty million, one hundred forty-three thousand, seven hundred forty".