30489240 has 64 divisors (see below), whose sum is σ = 93713760. Its totient is φ = 7930880.

The previous prime is 30489227. The next prime is 30489247. The reversal of 30489240 is 4298403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30489198 and 30489207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30489247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822 + ... + 8018.

Almost surely, 2^30489240 is an apocalyptic number.

30489240 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 30489240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46856880).

30489240 is an abundant number, since it is smaller than the sum of its proper divisors (63224520).

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

30489240 is a wasteful number, since it uses less digits than its factorization.

30489240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6248 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 30489240 is about 5521.7062580329. The cubic root of 30489240 is about 312.4032425780.

The spelling of 30489240 in words is "thirty million, four hundred eighty-nine thousand, two hundred forty".