400990580 has 48 divisors (see below), whose sum is σ = 885717504. Its totient is φ = 152280960.

The previous prime is 400990561. The next prime is 400990589. The reversal of 400990580 is 85099004.

It is a self number, because there is not a number n which added to its sum of digits gives 400990580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400990589) 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, 26759 + ... + 38961.

It is an arithmetic number, because the mean of its divisors is an integer number (18452448).

Almost surely, 2^400990580 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 400990580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442858752).

400990580 is an abundant number, since it is smaller than the sum of its proper divisors (484726924).

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

400990580 is a wasteful number, since it uses less digits than its factorization.

400990580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12296 (or 12294 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 400990580 is about 20024.7491869436. The cubic root of 400990580 is about 737.4140196615.

The spelling of 400990580 in words is "four hundred million, nine hundred ninety thousand, five hundred eighty".