69939768 has 128 divisors (see below), whose sum is σ = 196499520. Its totient is φ = 20643840.

The previous prime is 69939761. The next prime is 69939787. The reversal of 69939768 is 86793996.

It is a Cunningham number, because it is equal to 8363²-1.

It is a super-2 number, since 2×69939768² = 9783142295787648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69939761) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 618880 + ... + 618992.

Almost surely, 2^69939768 is an apocalyptic number.

69939768 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69939768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98249760).

69939768 is an abundant number, since it is smaller than the sum of its proper divisors (126559752).

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

69939768 is a wasteful number, since it uses less digits than its factorization.

69939768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 213 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 57.

The square root of 69939768 is about 8362.9999402128. Note that the first 4 decimals coincide. The cubic root of 69939768 is about 412.0102897484.

It can be divided in two parts, 69939 and 768, that added together give a palindrome (70707).

The spelling of 69939768 in words is "sixty-nine million, nine hundred thirty-nine thousand, seven hundred sixty-eight".