30236440 has 32 divisors (see below), whose sum is σ = 73266480. Its totient is φ = 11164032.

The previous prime is 30236431. The next prime is 30236441. The reversal of 30236440 is 4463203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30236441) 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, 28554 + ... + 29593.

Almost surely, 2^30236440 is an apocalyptic number.

It is an amenable number.

30236440 is an abundant number, since it is smaller than the sum of its proper divisors (43030040).

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

30236440 is a wasteful number, since it uses less digits than its factorization.

30236440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58171 (or 58167 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 30236440 is about 5498.7671345493. The cubic root of 30236440 is about 311.5374199177.

Adding to 30236440 its reverse (4463203), we get a palindrome (34699643).

The spelling of 30236440 in words is "thirty million, two hundred thirty-six thousand, four hundred forty".