3123978 has 48 divisors (see below), whose sum is σ = 7418208. Its totient is φ = 871200.

The previous prime is 3123977. The next prime is 3123983. The reversal of 3123978 is 8793213.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (3123973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9273 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (154546).

Almost surely, 2^3123978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3123978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3709104).

3123978 is an abundant number, since it is smaller than the sum of its proper divisors (4294230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3123978 is a wasteful number, since it uses less digits than its factorization.

3123978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 360 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 3123978 is about 1767.4778640764. The cubic root of 3123978 is about 146.1849473269.

The spelling of 3123978 in words is "three million, one hundred twenty-three thousand, nine hundred seventy-eight".