71272370 has 48 divisors (see below), whose sum is σ = 140284872. Its totient is φ = 26058240.

The previous prime is 71272337. The next prime is 71272387. The reversal of 71272370 is 7327217.

It can be written as a sum of positive squares in 12 ways, for example, as 20620681 + 50651689 = 4541^2 + 7117^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305774 + ... + 306006.

Almost surely, 2^71272370 is an apocalyptic number.

71272370 is a deficient number, since it is larger than the sum of its proper divisors (69012502).

71272370 is a wasteful number, since it uses less digits than its factorization.

71272370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 71272370 is about 8442.2964885154. The cubic root of 71272370 is about 414.6105990726.

Adding to 71272370 its reverse (7327217), we get a palindrome (78599587).

The spelling of 71272370 in words is "seventy-one million, two hundred seventy-two thousand, three hundred seventy".