400678873980 has 288 divisors, whose sum is σ = 1414755417600. Its totient is φ = 82314946560.

The previous prime is 400678873957. The next prime is 400678873981. The reversal of 400678873980 is 89378876004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400678873981) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36589546 + ... + 36600494.

It is an arithmetic number, because the mean of its divisors is an integer number (4912345200).

Almost surely, 2^400678873980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400678873980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707377708800).

400678873980 is an abundant number, since it is smaller than the sum of its proper divisors (1014076543620).

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

400678873980 is a wasteful number, since it uses less digits than its factorization.

400678873980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11157 (or 11066 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 400678873980 in words is "four hundred billion, six hundred seventy-eight million, eight hundred seventy-three thousand, nine hundred eighty".