78969652 has 18 divisors (see below), whose sum is σ = 139169058. Its totient is φ = 39208752.

The previous prime is 78969647. The next prime is 78969659. The reversal of 78969652 is 25696987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71808676 + 7160976 = 8474^2 + 2676^2 .

It is a super-3 number, since 3×78969652³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78969652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78969659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198718 + ... + 199114.

Almost surely, 2^78969652 is an apocalyptic number.

It is an amenable number.

78969652 is a deficient number, since it is larger than the sum of its proper divisors (60199406).

78969652 is a wasteful number, since it uses less digits than its factorization.

78969652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 622 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 78969652 is about 8886.4870449464. The cubic root of 78969652 is about 429.0290911822.

The spelling of 78969652 in words is "seventy-eight million, nine hundred sixty-nine thousand, six hundred fifty-two".