70849920 has 64 divisors (see below), whose sum is σ = 225840240. Its totient is φ = 18892800.

The previous prime is 70849907. The next prime is 70849921. The reversal of 70849920 is 2994807.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×70849920² = 10039422328012800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70849921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16531 + ... + 20370.

Almost surely, 2^70849920 is an apocalyptic number.

It is an amenable number.

70849920 is an abundant number, since it is smaller than the sum of its proper divisors (154990320).

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

70849920 is a wasteful number, since it uses less digits than its factorization.

70849920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36923 (or 36911 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 70849920 is about 8417.2394524571. The cubic root of 70849920 is about 413.7898067170.

The spelling of 70849920 in words is "seventy million, eight hundred forty-nine thousand, nine hundred twenty".