70636720 has 80 divisors (see below), whose sum is σ = 204772608. Its totient is φ = 22014720.

The previous prime is 70636711. The next prime is 70636729. The reversal of 70636720 is 2763607.

It is an interprime number because it is at equal distance from previous prime (70636711) and next prime (70636729).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70636729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427 + ... + 11893.

Almost surely, 2^70636720 is an apocalyptic number.

70636720 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 70636720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102386304).

70636720 is an abundant number, since it is smaller than the sum of its proper divisors (134135888).

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

70636720 is a wasteful number, since it uses less digits than its factorization.

70636720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11498 (or 11492 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 70636720 is about 8404.5654260051. The cubic root of 70636720 is about 413.3743340066.

The spelling of 70636720 in words is "seventy million, six hundred thirty-six thousand, seven hundred twenty".