30813480 has 128 divisors (see below), whose sum is σ = 104083200. Its totient is φ = 8107776.

The previous prime is 30813467. The next prime is 30813481. The reversal of 30813480 is 8431803.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111102 + ... + 111378.

It is an arithmetic number, because the mean of its divisors is an integer number (813150).

Almost surely, 2^30813480 is an apocalyptic number.

30813480 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 30813480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52041600).

30813480 is an abundant number, since it is smaller than the sum of its proper divisors (73269720).

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

30813480 is a wasteful number, since it uses less digits than its factorization.

30813480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 30813480 is about 5550.9891010522. The cubic root of 30813480 is about 313.5067648090.

It can be divided in two parts, 3081 and 3480, that added together give a 8-th power (6561 = 3⁸).

The spelling of 30813480 in words is "thirty million, eight hundred thirteen thousand, four hundred eighty".