30040140 has 96 divisors (see below), whose sum is σ = 95397120. Its totient is φ = 7001856.

The previous prime is 30040133. The next prime is 30040141. The reversal of 30040140 is 4104003.

It is a super-2 number, since 2×30040140² = 1804820022439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (30040141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13807 + ... + 15833.

It is an arithmetic number, because the mean of its divisors is an integer number (993720).

Almost surely, 2^30040140 is an apocalyptic number.

30040140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30040140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47698560).

30040140 is an abundant number, since it is smaller than the sum of its proper divisors (65356980).

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

30040140 is a wasteful number, since it uses less digits than its factorization.

30040140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 30040140 is about 5480.8886140844. Note that the first 3 decimals coincide. The cubic root of 30040140 is about 310.8617714032.

Adding to 30040140 its reverse (4104003), we get a palindrome (34144143).

The spelling of 30040140 in words is "thirty million, forty thousand, one hundred forty".