72163070 has 32 divisors (see below), whose sum is σ = 149231808. Its totient is φ = 24611328.

The previous prime is 72163067. The next prime is 72163093. The reversal of 72163070 is 7036127.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11174 + ... + 16406.

It is an arithmetic number, because the mean of its divisors is an integer number (4663494).

Almost surely, 2^72163070 is an apocalyptic number.

72163070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72163070 is an abundant number, since it is smaller than the sum of its proper divisors (77068738).

72163070 is a wasteful number, since it uses less digits than its factorization.

72163070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 72163070 is about 8494.8849315338. The cubic root of 72163070 is about 416.3306011946.

Adding to 72163070 its reverse (7036127), we get a palindrome (79199197).

The spelling of 72163070 in words is "seventy-two million, one hundred sixty-three thousand, seventy".