400061632 has 56 divisors (see below), whose sum is σ = 831591936. Its totient is φ = 190595328.

The previous prime is 400061617. The next prime is 400061633. The reversal of 400061632 is 236160004.

It is not an unprimeable number, because it can be changed into a prime (400061633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681243 + ... + 681829.

It is an arithmetic number, because the mean of its divisors is an integer number (14849856).

Almost surely, 2^400061632 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 400061632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415795968).

400061632 is an abundant number, since it is smaller than the sum of its proper divisors (431530304).

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

400061632 is a wasteful number, since it uses less digits than its factorization.

400061632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 400061632 is about 20001.5407406530. The cubic root of 400061632 is about 736.8441401562.

The spelling of 400061632 in words is "four hundred million, sixty-one thousand, six hundred thirty-two".