400673403738 has 32 divisors (see below), whose sum is σ = 899029872000. Its totient is φ = 132261121728.

The previous prime is 400673403737. The next prime is 400673403749. The reversal of 400673403738 is 837304376004.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400673403693 and 400673403702.

It is not an unprimeable number, because it can be changed into a prime (400673403737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36013263 + ... + 36024386.

It is an arithmetic number, because the mean of its divisors is an integer number (28094683500).

Almost surely, 2^400673403738 is an apocalyptic number.

400673403738 is an abundant number, since it is smaller than the sum of its proper divisors (498356468262).

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

400673403738 is a wasteful number, since it uses less digits than its factorization.

400673403738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72037763 (or 72037757 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 400673403738 in words is "four hundred billion, six hundred seventy-three million, four hundred three thousand, seven hundred thirty-eight".