30480240 has 80 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 6966528.

The previous prime is 30480239. The next prime is 30480251. The reversal of 30480240 is 4208403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7392 + ... + 10751.

Almost surely, 2^30480240 is an apocalyptic number.

30480240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30480240 is an abundant number, since it is smaller than the sum of its proper divisors (77512848).

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

30480240 is a wasteful number, since it uses less digits than its factorization.

30480240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18166 (or 18160 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30480240 is about 5520.8912324008. The cubic root of 30480240 is about 312.3725005208.

Adding to 30480240 its reverse (4208403), we get a palindrome (34688643).

The spelling of 30480240 in words is "thirty million, four hundred eighty thousand, two hundred forty".