78989950 has 24 divisors (see below), whose sum is σ = 158224248. Its totient is φ = 29165280.

The previous prime is 78989941. The next prime is 78989959. The reversal of 78989950 is 5998987.

It is an interprime number because it is at equal distance from previous prime (78989941) and next prime (78989959).

It is a junction number, because it is equal to n+sod(n) for n = 78989891 and 78989900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78989959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60112 + ... + 61411.

It is an arithmetic number, because the mean of its divisors is an integer number (6592677).

Almost surely, 2^78989950 is an apocalyptic number.

78989950 is an abundant number, since it is smaller than the sum of its proper divisors (79234298).

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

78989950 is a wasteful number, since it uses less digits than its factorization.

78989950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121548 (or 121543 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 78989950 is about 8887.6290426637. The cubic root of 78989950 is about 429.0658465950.

The spelling of 78989950 in words is "seventy-eight million, nine hundred eighty-nine thousand, nine hundred fifty".