69448640 has 28 divisors (see below), whose sum is σ = 165375336. Its totient is φ = 27779328.

The previous prime is 69448583. The next prime is 69448669. The reversal of 69448640 is 4684496.

It is a super-2 number, since 2×69448640² = 9646227195699200, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 108194 + ... + 108833.

It is an arithmetic number, because the mean of its divisors is an integer number (5906262).

Almost surely, 2^69448640 is an apocalyptic number.

It is an amenable number.

69448640 is an abundant number, since it is smaller than the sum of its proper divisors (95926696).

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

69448640 is a wasteful number, since it uses less digits than its factorization.

69448640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217044 (or 217034 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 69448640 is about 8333.5850628646. The cubic root of 69448640 is about 411.0436232589.

The spelling of 69448640 in words is "sixty-nine million, four hundred forty-eight thousand, six hundred forty".