70109520 has 160 divisors (see below), whose sum is σ = 244484352. Its totient is φ = 16490496.

The previous prime is 70109509. The next prime is 70109521. The reversal of 70109520 is 2590107.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70109521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71272 + ... + 72248.

Almost surely, 2^70109520 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 70109520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122242176).

70109520 is an abundant number, since it is smaller than the sum of its proper divisors (174374832).

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

70109520 is a wasteful number, since it uses less digits than its factorization.

70109520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 70109520 is about 8373.1427791481. The cubic root of 70109520 is about 412.3433528255.

Adding to 70109520 its reverse (2590107), we get a palindrome (72699627).

The spelling of 70109520 in words is "seventy million, one hundred nine thousand, five hundred twenty".