618722 has 16 divisors (see below), whose sum is σ = 1020600. Its totient is φ = 279552.

The previous prime is 618719. The next prime is 618799. The reversal of 618722 is 227816.

It can be written as a sum of positive squares in 4 ways, for example, as 516961 + 101761 = 719^2 + 319^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 618691 and 618700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154 + ... + 1602.

2⁶¹⁸⁷²² is an apocalyptic number.

618722 is a deficient number, since it is larger than the sum of its proper divisors (401878).

618722 is a wasteful number, since it uses less digits than its factorization.

618722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 1344, while the sum is 26.

The square root of 618722 is about 786.5888379579. The cubic root of 618722 is about 85.2115606581.

The spelling of 618722 in words is "six hundred eighteen thousand, seven hundred twenty-two".