30371140 has 24 divisors (see below), whose sum is σ = 63927360. Its totient is φ = 12120288.

The previous prime is 30371137. The next prime is 30371147. The reversal of 30371140 is 4117303.

It is a super-2 number, since 2×30371140² = 1844812289799200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30371147) 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, 8551 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (2663640).

Almost surely, 2^30371140 is an apocalyptic number.

It is an amenable number.

30371140 is an abundant number, since it is smaller than the sum of its proper divisors (33556220).

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

30371140 is a wasteful number, since it uses less digits than its factorization.

30371140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531 (or 3529 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30371140 is about 5511.0017238248. The cubic root of 30371140 is about 311.9993562336. Note that the first 3 decimals are identical.

Subtracting from 30371140 its sum of digits (19), we obtain a square (30371121 = 5511²).

Adding to 30371140 its reverse (4117303), we get a palindrome (34488443).

The spelling of 30371140 in words is "thirty million, three hundred seventy-one thousand, one hundred forty".