78961236 has 24 divisors (see below), whose sum is σ = 185876544. Its totient is φ = 26087040.

The previous prime is 78961199. The next prime is 78961241. The reversal of 78961236 is 63216987.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27760 + ... + 30471.

It is an arithmetic number, because the mean of its divisors is an integer number (7744856).

Almost surely, 2^78961236 is an apocalyptic number.

It is an amenable number.

78961236 is an abundant number, since it is smaller than the sum of its proper divisors (106915308).

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

78961236 is a wasteful number, since it uses less digits than its factorization.

78961236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58351 (or 58349 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 78961236 is about 8886.0135043787. The cubic root of 78961236 is about 429.0138497276.

It can be divided in two parts, 78961 and 236, that added together give a palindrome (79197).

The spelling of 78961236 in words is "seventy-eight million, nine hundred sixty-one thousand, two hundred thirty-six".