70218420 has 48 divisors (see below), whose sum is σ = 197292480. Its totient is φ = 18660096.

The previous prime is 70218413. The next prime is 70218431. The reversal of 70218420 is 2481207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16911 + ... + 20649.

It is an arithmetic number, because the mean of its divisors is an integer number (4110260).

Almost surely, 2^70218420 is an apocalyptic number.

It is an amenable number.

70218420 is an abundant number, since it is smaller than the sum of its proper divisors (127074060).

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

70218420 is a wasteful number, since it uses less digits than its factorization.

70218420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 70218420 is about 8379.6431904944. The cubic root of 70218420 is about 412.5567378338.

Adding to 70218420 its reverse (2481207), we get a palindrome (72699627).

The spelling of 70218420 in words is "seventy million, two hundred eighteen thousand, four hundred twenty".