873646378 has 12 divisors (see below), whose sum is σ = 1440433890. Its totient is φ = 397111880.

The previous prime is 873646369. The next prime is 873646379.

873646378 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 794845249 + 78801129 = 28193^2 + 8877^2 .

It is not an unprimeable number, because it can be changed into a prime (873646379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1804813 + ... + 1805296.

Almost surely, 2^873646378 is an apocalyptic number.

873646378 is a deficient number, since it is larger than the sum of its proper divisors (566787512).

873646378 is a wasteful number, since it uses less digits than its factorization.

873646378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610133 (or 3610122 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 52.

The square root of 873646378 is about 29557.5096718245. The cubic root of 873646378 is about 955.9721205025.

The spelling of 873646378 in words is "eight hundred seventy-three million, six hundred forty-six thousand, three hundred seventy-eight".