30813048 has 80 divisors (see below), whose sum is σ = 98648880. Its totient is φ = 8802432.

The previous prime is 30813047. The next prime is 30813049. The reversal of 30813048 is 84031803.

It is an interprime number because it is at equal distance from previous prime (30813047) and next prime (30813049).

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 (30813043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1140 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (1233111).

Almost surely, 2^30813048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30813048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49324440).

30813048 is an abundant number, since it is smaller than the sum of its proper divisors (67835832).

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

30813048 is a wasteful number, since it uses less digits than its factorization.

30813048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818 (or 6805 counting only the distinct ones).

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

The square root of 30813048 is about 5550.9501889316. The cubic root of 30813048 is about 313.5052996975.

The spelling of 30813048 in words is "thirty million, eight hundred thirteen thousand, forty-eight".