400654620 has 96 divisors (see below), whose sum is σ = 1259496000. Its totient is φ = 105725952.

The previous prime is 400654619. The next prime is 400654627. The reversal of 400654620 is 26456004.

It is a happy number.

400654620 is a `hidden beast` number, since 4 + 0 + 0 + 654 + 6 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400654627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48556 + ... + 56204.

It is an arithmetic number, because the mean of its divisors is an integer number (13119750).

Almost surely, 2^400654620 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 400654620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629748000).

400654620 is an abundant number, since it is smaller than the sum of its proper divisors (858841380).

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

400654620 is a wasteful number, since it uses less digits than its factorization.

400654620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764 (or 7756 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 400654620 is about 20016.3588097336. The cubic root of 400654620 is about 737.2080207788.

The spelling of 400654620 in words is "four hundred million, six hundred fifty-four thousand, six hundred twenty".