872378 has 24 divisors (see below), whose sum is σ = 1482300. Its totient is φ = 384384.

The previous prime is 872369. The next prime is 872381. The reversal of 872378 is 873278.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 49729 + 822649 = 223^2 + 907^2 .

It is a super-2 number, since 2×872378² = 1522086749768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9758 + ... + 9846.

2⁸⁷²³⁷⁸ is an apocalyptic number.

872378 is a deficient number, since it is larger than the sum of its proper divisors (609922).

872378 is a wasteful number, since it uses less digits than its factorization.

872378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 133 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 872378 is about 934.0117772277. The cubic root of 872378 is about 95.5509263026.

Subtracting 872378 from its reverse (873278), we obtain a square (900 = 30²).

The spelling of 872378 in words is "eight hundred seventy-two thousand, three hundred seventy-eight".