69821380 has 24 divisors (see below), whose sum is σ = 155250648. Its totient is φ = 26285568.

The previous prime is 69821369. The next prime is 69821419. The reversal of 69821380 is 8312896.

It can be written as a sum of positive squares in 4 ways, for example, as 18096516 + 51724864 = 4254^2 + 7192^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102339 + ... + 103018.

It is an arithmetic number, because the mean of its divisors is an integer number (6468777).

Almost surely, 2^69821380 is an apocalyptic number.

It is an amenable number.

69821380 is an abundant number, since it is smaller than the sum of its proper divisors (85429268).

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

69821380 is a wasteful number, since it uses less digits than its factorization.

69821380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205383 (or 205381 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 69821380 is about 8355.9188603050. The cubic root of 69821380 is about 411.7776866416. Note that the first 3 decimals are identical.

The spelling of 69821380 in words is "sixty-nine million, eight hundred twenty-one thousand, three hundred eighty".