344685978 has 72 divisors (see below), whose sum is σ = 924270048. Its totient is φ = 90900576.

The previous prime is 344685947. The next prime is 344685997. The reversal of 344685978 is 879586443.

344685978 is a `hidden beast` number, since 3 + 4 + 46 + 8 + 597 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13201 + ... + 29387.

It is an arithmetic number, because the mean of its divisors is an integer number (12837084).

Almost surely, 2^344685978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 344685978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462135024).

344685978 is an abundant number, since it is smaller than the sum of its proper divisors (579584070).

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

344685978 is a wasteful number, since it uses less digits than its factorization.

344685978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16228 (or 16212 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 344685978 is about 18565.7205085071. The cubic root of 344685978 is about 701.1450497327.

The spelling of 344685978 in words is "three hundred forty-four million, six hundred eighty-five thousand, nine hundred seventy-eight".