30072140 has 48 divisors (see below), whose sum is σ = 73113600. Its totient is φ = 10176192.

The previous prime is 30072137. The next prime is 30072143. The reversal of 30072140 is 4127003.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30072137) and next prime (30072143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30072143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9701 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (1523200).

Almost surely, 2^30072140 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 30072140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36556800).

30072140 is an abundant number, since it is smaller than the sum of its proper divisors (43041460).

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

30072140 is a wasteful number, since it uses less digits than its factorization.

30072140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 30072140 is about 5483.8070717340. The cubic root of 30072140 is about 310.9721131724.

Adding to 30072140 its reverse (4127003), we get a palindrome (34199143).

The spelling of 30072140 in words is "thirty million, seventy-two thousand, one hundred forty".