391090469012 has 24 divisors (see below), whose sum is σ = 703003957320. Its totient is φ = 190233671040.

The previous prime is 391090468973. The next prime is 391090469017. The reversal of 391090469012 is 210964090193.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 106058343556 + 285032125456 = 325666^2 + 533884^2 .

It is a super-2 number, since 2×391090469012² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391090469017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900962 + ... + 1262502.

It is an arithmetic number, because the mean of its divisors is an integer number (29291831555).

Almost surely, 2^391090469012 is an apocalyptic number.

It is an amenable number.

391090469012 is a deficient number, since it is larger than the sum of its proper divisors (311913488308).

391090469012 is a wasteful number, since it uses less digits than its factorization.

391090469012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368891 (or 368889 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 391090469012 in words is "three hundred ninety-one billion, ninety million, four hundred sixty-nine thousand, twelve".