712172778 has 16 divisors (see below), whose sum is σ = 1473461280. Its totient is φ = 229204976.

The previous prime is 712172719. The next prime is 712172779. The reversal of 712172778 is 877271217.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (712172779) 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, 2046300 + ... + 2046647.

It is an arithmetic number, because the mean of its divisors is an integer number (92091330).

Almost surely, 2^712172778 is an apocalyptic number.

712172778 is an abundant number, since it is smaller than the sum of its proper divisors (761288502).

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

712172778 is a wasteful number, since it uses less digits than its factorization.

712172778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092981.

The product of its digits is 76832, while the sum is 42.

The square root of 712172778 is about 26686.5654965190. The cubic root of 712172778 is about 893.0212426505.

The spelling of 712172778 in words is "seven hundred twelve million, one hundred seventy-two thousand, seven hundred seventy-eight".