400340131323428 has 24 divisors (see below), whose sum is σ = 732272291237760. Its totient is φ = 191148438571200.

The previous prime is 400340131323409. The next prime is 400340131323479. The reversal of 400340131323428 is 824323131043004.

It is a junction number, because it is equal to n+sod(n) for n = 400340131323391 and 400340131323400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3620180288 + ... + 3620290871.

It is an arithmetic number, because the mean of its divisors is an integer number (30511345468240).

Almost surely, 2^{400340131323428} is an apocalyptic number.

It is an amenable number.

400340131323428 is a deficient number, since it is larger than the sum of its proper divisors (331932159914332).

400340131323428 is a wasteful number, since it uses less digits than its factorization.

400340131323428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240471787 (or 7240471785 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 400340131323428 in words is "four hundred trillion, three hundred forty billion, one hundred thirty-one million, three hundred twenty-three thousand, four hundred twenty-eight".