69999980 has 12 divisors (see below), whose sum is σ = 147000000. Its totient is φ = 27999984.

The previous prime is 69999973. The next prime is 69999989. The reversal of 69999980 is 8999996.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (69999989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1749980 + ... + 1750019.

It is an arithmetic number, because the mean of its divisors is an integer number (12250000).

Almost surely, 2^69999980 is an apocalyptic number.

It is an amenable number.

69999980 is an abundant number, since it is smaller than the sum of its proper divisors (77000020).

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

69999980 is a wasteful number, since it uses less digits than its factorization.

69999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500008 (or 3500006 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 59.

The square root of 69999980 is about 8366.5990701121. The cubic root of 69999980 is about 412.1284907305.

The spelling of 69999980 in words is "sixty-nine million, nine hundred ninety-nine thousand, nine hundred eighty".