70730503728 has 40 divisors (see below), whose sum is σ = 185033395200. Its totient is φ = 23278392384.

The previous prime is 70730503721. The next prime is 70730503757. The reversal of 70730503728 is 82730503707.

It is a self number, because there is not a number n which added to its sum of digits gives 70730503728.

It is not an unprimeable number, because it can be changed into a prime (70730503721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9322488 + ... + 9330071.

It is an arithmetic number, because the mean of its divisors is an integer number (4625834880).

Almost surely, 2^70730503728 is an apocalyptic number.

It is an amenable number.

70730503728 is an abundant number, since it is smaller than the sum of its proper divisors (114302891472).

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

70730503728 is a wasteful number, since it uses less digits than its factorization.

70730503728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18652649 (or 18652643 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 70730503728 in words is "seventy billion, seven hundred thirty million, five hundred three thousand, seven hundred twenty-eight".