340509628866 has 64 divisors (see below), whose sum is σ = 786126643200. Its totient is φ = 97242091200.

The previous prime is 340509628813. The next prime is 340509628871. The reversal of 340509628866 is 668826905043.

It is a super-2 number, since 2×340509628866² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471321 + ... + 950348.

It is an arithmetic number, because the mean of its divisors is an integer number (12283228800).

Almost surely, 2^340509628866 is an apocalyptic number.

340509628866 is an abundant number, since it is smaller than the sum of its proper divisors (445617014334).

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

340509628866 is a wasteful number, since it uses less digits than its factorization.

340509628866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421895.

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 340509628866 in words is "three hundred forty billion, five hundred nine million, six hundred twenty-eight thousand, eight hundred sixty-six".