30793021380 has 216 divisors, whose sum is σ = 103019670936. Its totient is φ = 7439477760.

The previous prime is 30793021373. The next prime is 30793021381. The reversal of 30793021380 is 8312039703.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4496507136 + 26296514244 = 67056^2 + 162162^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (30793021381) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6814882 + ... + 6819398.

It is an arithmetic number, because the mean of its divisors is an integer number (476942921).

Almost surely, 2^30793021380 is an apocalyptic number.

30793021380 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 30793021380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51509835468).

30793021380 is an abundant number, since it is smaller than the sum of its proper divisors (72226649556).

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

30793021380 is a wasteful number, since it uses less digits than its factorization.

30793021380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4867 (or 4851 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 30793021380 in words is "thirty billion, seven hundred ninety-three million, twenty-one thousand, three hundred eighty".