1623872 has 14 divisors (see below), whose sum is σ = 3222498. Its totient is φ = 811904.

The previous prime is 1623863. The next prime is 1623883. The reversal of 1623872 is 2783261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 891136 + 732736 = 944^2 + 856^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12623 + ... + 12750.

2^1623872 is an apocalyptic number.

It is an amenable number.

1623872 is a deficient number, since it is larger than the sum of its proper divisors (1598626).

1623872 is an equidigital number, since it uses as much as digits as its factorization.

1623872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25385 (or 25375 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 1623872 is about 1274.3123635907. The cubic root of 1623872 is about 117.5395249556.

It can be divided in two parts, 162 and 3872, that multiplied together give a square (627264 = 792²).

The spelling of 1623872 in words is "one million, six hundred twenty-three thousand, eight hundred seventy-two".