30438140 has 24 divisors (see below), whose sum is σ = 65282112. Its totient is φ = 11915840.

The previous prime is 30438137. The next prime is 30438169. The reversal of 30438140 is 4183403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15251 + ... + 17130.

It is an arithmetic number, because the mean of its divisors is an integer number (2720088).

Almost surely, 2^30438140 is an apocalyptic number.

It is an amenable number.

30438140 is an abundant number, since it is smaller than the sum of its proper divisors (34843972).

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

30438140 is a wasteful number, since it uses less digits than its factorization.

30438140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32437 (or 32435 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 30438140 is about 5517.0771247101. The cubic root of 30438140 is about 312.2286155898.

The spelling of 30438140 in words is "thirty million, four hundred thirty-eight thousand, one hundred forty".