623722 has 8 divisors (see below), whose sum is σ = 1020672. Its totient is φ = 283500.

The previous prime is 623719. The next prime is 623723. The reversal of 623722 is 227326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 28351 = 623722 / (6 + 2 + 3 + 7 + 2 + 2).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 623693 and 623702.

It is not an unprimeable number, because it can be changed into a prime (623723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14154 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (127584).

2⁶²³⁷²² is an apocalyptic number.

623722 is a deficient number, since it is larger than the sum of its proper divisors (396950).

623722 is a wasteful number, since it uses less digits than its factorization.

623722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28364.

The product of its digits is 1008, while the sum is 22.

The square root of 623722 is about 789.7607232574. The cubic root of 623722 is about 85.4404815875.

The spelling of 623722 in words is "six hundred twenty-three thousand, seven hundred twenty-two".