30237140 has 48 divisors (see below), whose sum is σ = 67510800. Its totient is φ = 11354112.

The previous prime is 30237139. The next prime is 30237161. The reversal of 30237140 is 4173203.

It can be written as a sum of positive squares in 8 ways, for example, as 839056 + 29398084 = 916^2 + 5422^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20756 + ... + 22164.

It is an arithmetic number, because the mean of its divisors is an integer number (1406475).

Almost surely, 2^30237140 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 30237140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33755400).

30237140 is an abundant number, since it is smaller than the sum of its proper divisors (37273660).

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

30237140 is a wasteful number, since it uses less digits than its factorization.

30237140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30237140 is about 5498.8307848123. The cubic root of 30237140 is about 311.5398240202.

The spelling of 30237140 in words is "thirty million, two hundred thirty-seven thousand, one hundred forty".