70681920 has 224 divisors, whose sum is σ = 244912896. Its totient is φ = 17203200.

The previous prime is 70681907. The next prime is 70681943. The reversal of 70681920 is 2918607.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995485 + ... + 995555.

Almost surely, 2^70681920 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 70681920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122456448).

70681920 is an abundant number, since it is smaller than the sum of its proper divisors (174230976).

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

70681920 is a wasteful number, since it uses less digits than its factorization.

70681920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 70681920 is about 8407.2540106744. The cubic root of 70681920 is about 413.4624870991.

The spelling of 70681920 in words is "seventy million, six hundred eighty-one thousand, nine hundred twenty".