396699505440 has 192 divisors, whose sum is σ = 1474186936320. Its totient is φ = 87749176320.

The previous prime is 396699505421. The next prime is 396699505451. The reversal of 396699505440 is 44505996693.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 1800120 + ... + 2008439.

It is an arithmetic number, because the mean of its divisors is an integer number (7678056960).

Almost surely, 2^396699505440 is an apocalyptic number.

396699505440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

396699505440 is an abundant number, since it is smaller than the sum of its proper divisors (1077487430880).

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

396699505440 is a wasteful number, since it uses less digits than its factorization.

396699505440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808615 (or 3808607 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 60.

The spelling of 396699505440 in words is "three hundred ninety-six billion, six hundred ninety-nine million, five hundred five thousand, four hundred forty".