2605023978 has 8 divisors (see below), whose sum is σ = 5210047968. Its totient is φ = 868341324.

The previous prime is 2605023959. The next prime is 2605023983. The reversal of 2605023978 is 8793205062.

It is a sphenic number, since it is the product of 3 distinct primes.

2605023978 is an admirable number.

It is a super-2 number, since 2×2605023978² = 13572299851909888968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217085326 + ... + 217085337.

It is an arithmetic number, because the mean of its divisors is an integer number (651255996).

Almost surely, 2^2605023978 is an apocalyptic number.

2605023978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2605023978 is a wasteful number, since it uses less digits than its factorization.

2605023978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434170668.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 2605023978 is about 51039.4355180384. The cubic root of 2605023978 is about 1375.9539787232.

The spelling of 2605023978 in words is "two billion, six hundred five million, twenty-three thousand, nine hundred seventy-eight".