70255920 has 320 divisors, whose sum is σ = 274268160. Its totient is φ = 14515200.

The previous prime is 70255909. The next prime is 70255973. The reversal of 70255920 is 2955207.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 989485 + ... + 989555.

It is an arithmetic number, because the mean of its divisors is an integer number (857088).

Almost surely, 2^70255920 is an apocalyptic number.

70255920 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 70255920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137134080).

70255920 is an abundant number, since it is smaller than the sum of its proper divisors (204012240).

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

70255920 is a wasteful number, since it uses less digits than its factorization.

70255920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 70255920 is about 8381.8804572721. The cubic root of 70255920 is about 412.6301664508.

The spelling of 70255920 in words is "seventy million, two hundred fifty-five thousand, nine hundred twenty".