400275489024 has 180 divisors, whose sum is σ = 1210364084160. Its totient is φ = 131545451520.

The previous prime is 400275489023. The next prime is 400275489041. The reversal of 400275489024 is 420984572004.

It is a super-2 number, since 2×400275489024² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400275489023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1336317 + ... + 1608195.

It is an arithmetic number, because the mean of its divisors is an integer number (6724244912).

Almost surely, 2^400275489024 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 400275489024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605182042080).

400275489024 is an abundant number, since it is smaller than the sum of its proper divisors (810088595136).

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

400275489024 is an equidigital number, since it uses as much as digits as its factorization.

400275489024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271978 (or 271955 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 400275489024 in words is "four hundred billion, two hundred seventy-five million, four hundred eighty-nine thousand, twenty-four".