388722 has 32 divisors (see below), whose sum is σ = 853632. Its totient is φ = 117504.

The previous prime is 388711. The next prime is 388727. The reversal of 388722 is 227883.

Added to its reverse (227883) it gives a triangular number (616605 = T₁₁₁₀).

It is a super-2 number, since 2×388722² = 302209586568, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3⁶ + 8 + 7⁶ + 8⁴ + 2¹² + 2¹⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 388722.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 388722.

It is not an unprimeable number, because it can be changed into a prime (388727) by changing a digit.

388722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3723 + ... + 3825.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2³⁸⁸⁷²² is an apocalyptic number.

388722 is an abundant number, since it is smaller than the sum of its proper divisors (464910).

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

388722 is a wasteful number, since it uses less digits than its factorization.

388722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162.

The product of its digits is 5376, while the sum is 30.

The square root of 388722 is about 623.4757413084. The cubic root of 388722 is about 72.9815428411.

Adding to 388722 its reverse (227883), we get a triangular number (616605 = T₁₁₁₀).

The spelling of 388722 in words is "three hundred eighty-eight thousand, seven hundred twenty-two".