400007070 has 96 divisors (see below), whose sum is σ = 1090593504. Its totient is φ = 101606400.

The previous prime is 400007021. The next prime is 400007071. The reversal of 400007070 is 70700004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400007071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157410 + ... + 159930.

It is an arithmetic number, because the mean of its divisors is an integer number (11360349).

Almost surely, 2^400007070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400007070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545296752).

400007070 is an abundant number, since it is smaller than the sum of its proper divisors (690586434).

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

400007070 is a wasteful number, since it uses less digits than its factorization.

400007070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 400007070 is about 20000.1767492190. The cubic root of 400007070 is about 736.8106407196.

Adding to 400007070 its reverse (70700004), we get a palindrome (470707074).

The spelling of 400007070 in words is "four hundred million, seven thousand, seventy".