400357218580 has 72 divisors (see below), whose sum is σ = 929920963104. Its totient is φ = 143589715200.

The previous prime is 400357218577. The next prime is 400357218581. The reversal of 400357218580 is 85812753004.

It is a super-2 number, since 2×400357218580² (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 (400357218581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1001635 + ... + 1343125.

It is an arithmetic number, because the mean of its divisors is an integer number (12915568932).

Almost surely, 2^400357218580 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 400357218580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464960481552).

400357218580 is an abundant number, since it is smaller than the sum of its proper divisors (529563744524).

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

400357218580 is a wasteful number, since it uses less digits than its factorization.

400357218580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341657 (or 341582 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 400357218580 in words is "four hundred billion, three hundred fifty-seven million, two hundred eighteen thousand, five hundred eighty".