340978656 has 48 divisors (see below), whose sum is σ = 947724624. Its totient is φ = 106973184.

The previous prime is 340978633. The next prime is 340978663. The reversal of 340978656 is 656879043.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102835 + ... + 106098.

It is an arithmetic number, because the mean of its divisors is an integer number (19744263).

Almost surely, 2^340978656 is an apocalyptic number.

It is an amenable number.

340978656 is an abundant number, since it is smaller than the sum of its proper divisors (606745968).

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

340978656 is a wasteful number, since it uses less digits than its factorization.

340978656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208963 (or 208955 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 340978656 is about 18465.6073823744. The cubic root of 340978656 is about 698.6222260320.

The spelling of 340978656 in words is "three hundred forty million, nine hundred seventy-eight thousand, six hundred fifty-six".