722214387 has 20 divisors (see below), whose sum is σ = 1084002216. Its totient is φ = 479183040.

The previous prime is 722214307. The next prime is 722214391. The reversal of 722214387 is 783412227.

It is not a de Polignac number, because 722214387 - 2¹¹ = 722212339 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (722214307) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4038 + ... + 38219.

Almost surely, 2^722214387 is an apocalyptic number.

722214387 is a deficient number, since it is larger than the sum of its proper divisors (361787829).

722214387 is a wasteful number, since it uses less digits than its factorization.

722214387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42480 (or 42471 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 722214387 is about 26874.0467179768. The cubic root of 722214387 is about 897.1988574900.

It can be divided in two parts, 7222 and 14387, that added together give a square (21609 = 147²).

The spelling of 722214387 in words is "seven hundred twenty-two million, two hundred fourteen thousand, three hundred eighty-seven".