70913920 has 128 divisors (see below), whose sum is σ = 211507200. Its totient is φ = 22087680.

The previous prime is 70913897. The next prime is 70913933. The reversal of 70913920 is 2931907.

It is a tau number, because it is divible by the number of its divisors (128).

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, 48561 + ... + 49999.

It is an arithmetic number, because the mean of its divisors is an integer number (1652400).

Almost surely, 2^70913920 is an apocalyptic number.

70913920 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 70913920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105753600).

70913920 is an abundant number, since it is smaller than the sum of its proper divisors (140593280).

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

70913920 is a wasteful number, since it uses less digits than its factorization.

70913920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 70913920 is about 8421.0403157805. The cubic root of 70913920 is about 413.9143637976.

It can be divided in two parts, 7091 and 3920, that added together give a palindrome (11011).

The spelling of 70913920 in words is "seventy million, nine hundred thirteen thousand, nine hundred twenty".