400146580 has 48 divisors (see below), whose sum is σ = 865975824. Its totient is φ = 155243520.

The previous prime is 400146577. The next prime is 400146587. The reversal of 400146580 is 85641004.

It can be written as a sum of positive squares in 8 ways, for example, as 226576 + 399920004 = 476^2 + 19998^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400146587) 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, 86814 + ... + 91306.

It is an arithmetic number, because the mean of its divisors is an integer number (18041163).

Almost surely, 2^400146580 is an apocalyptic number.

It is an amenable number.

400146580 is an abundant number, since it is smaller than the sum of its proper divisors (465829244).

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

400146580 is a wasteful number, since it uses less digits than its factorization.

400146580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4634 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 400146580 is about 20003.6641643475. The cubic root of 400146580 is about 736.8962896262.

Adding to 400146580 its reverse (85641004), we get a palindrome (485787584).

The spelling of 400146580 in words is "four hundred million, one hundred forty-six thousand, five hundred eighty".