30720748032 has 480 divisors, whose sum is σ = 100379575296. Its totient is φ = 8980070400.

The previous prime is 30720748013. The next prime is 30720748049. The reversal of 30720748032 is 23084702703.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131848588 + ... + 131848820.

Almost surely, 2^30720748032 is an apocalyptic number.

30720748032 is a gapful number since it is divisible by the number (32) 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 30720748032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50189787648).

30720748032 is an abundant number, since it is smaller than the sum of its proper divisors (69658827264).

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

30720748032 is a wasteful number, since it uses less digits than its factorization.

30720748032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 30720748032 in words is "thirty billion, seven hundred twenty million, seven hundred forty-eight thousand, thirty-two".