400002708 has 96 divisors (see below), whose sum is σ = 1103155200. Its totient is φ = 110422656.

The previous prime is 400002689. The next prime is 400002709. The reversal of 400002708 is 807200004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400002709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555973 + ... + 556691.

It is an arithmetic number, because the mean of its divisors is an integer number (11491200).

Almost surely, 2^400002708 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 400002708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551577600).

400002708 is an abundant number, since it is smaller than the sum of its proper divisors (703152492).

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

400002708 is a wasteful number, since it uses less digits than its factorization.

400002708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 400002708 is about 20000.0676998854. The cubic root of 400002708 is about 736.8079624505.

The spelling of 400002708 in words is "four hundred million, two thousand, seven hundred eight".