30138071072 has 18 divisors (see below), whose sum is σ = 59336260893. Its totient is φ = 15068544512.

The previous prime is 30138071069. The next prime is 30138071081. The reversal of 30138071072 is 27017083103.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 17807301136 + 12330769936 = 133444^2 + 111044^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=122756.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 966704 + ... + 997392.

Almost surely, 2^30138071072 is an apocalyptic number.

30138071072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30138071072 is a deficient number, since it is larger than the sum of its proper divisors (29198189821).

30138071072 is an frugal number, since it uses more digits than its factorization.

30138071072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61388 (or 30691 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

Multiplying 30138071072 by its sum of digits (32), we get a square (964418274304 = 982048²).

30138071072 divided by its sum of digits (32) gives a square (941814721 = 30689²).

The spelling of 30138071072 in words is "thirty billion, one hundred thirty-eight million, seventy-one thousand, seventy-two".