70223940 has 144 divisors (see below), whose sum is σ = 230329008. Its totient is φ = 17252352.

The previous prime is 70223927. The next prime is 70223941. The reversal of 70223940 is 4932207.

It can be written as a sum of positive squares in 8 ways, for example, as 66564 + 70157376 = 258^2 + 8376^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70223941) 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, 161964 + ... + 162396.

It is an arithmetic number, because the mean of its divisors is an integer number (1599507).

Almost surely, 2^70223940 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 70223940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115164504).

70223940 is an abundant number, since it is smaller than the sum of its proper divisors (160105068).

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

70223940 is a wasteful number, since it uses less digits than its factorization.

70223940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 70223940 is about 8379.9725536543. The cubic root of 70223940 is about 412.5675481668.

It can be divided in two parts, 702 and 23940, that added together give a palindrome (24642).

The spelling of 70223940 in words is "seventy million, two hundred twenty-three thousand, nine hundred forty".