70021700 has 72 divisors (see below), whose sum is σ = 176363712. Its totient is φ = 23633280.

The previous prime is 70021697. The next prime is 70021711. The reversal of 70021700 is 712007.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46154 + ... + 47646.

It is an arithmetic number, because the mean of its divisors is an integer number (2449496).

Almost surely, 2^70021700 is an apocalyptic number.

70021700 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70021700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88181856).

70021700 is an abundant number, since it is smaller than the sum of its proper divisors (106342012).

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

70021700 is a wasteful number, since it uses less digits than its factorization.

70021700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 70021700 is about 8367.8969878937. The cubic root of 70021700 is about 412.1711121958.

Adding to 70021700 its reverse (712007), we get a palindrome (70733707).

The spelling of 70021700 in words is "seventy million, twenty-one thousand, seven hundred".