70728825 has 48 divisors (see below), whose sum is σ = 124992000. Its totient is φ = 35212800.

The previous prime is 70728821. The next prime is 70728839. The reversal of 70728825 is 52882707.

It is not a de Polignac number, because 70728825 - 2² = 70728821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70728821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66901 + ... + 67949.

It is an arithmetic number, because the mean of its divisors is an integer number (2604000).

Almost surely, 2^70728825 is an apocalyptic number.

70728825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70728825 is a deficient number, since it is larger than the sum of its proper divisors (54263175).

70728825 is a wasteful number, since it uses less digits than its factorization.

70728825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 70728825 is about 8410.0431033378. The cubic root of 70728825 is about 413.5539257096.

The spelling of 70728825 in words is "seventy million, seven hundred twenty-eight thousand, eight hundred twenty-five".