78497950 has 24 divisors (see below), whose sum is σ = 146271888. Its totient is φ = 31342080.

The previous prime is 78497941. The next prime is 78497953. The reversal of 78497950 is 5979487.

It is a happy number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 78497894 and 78497903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78497953) 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, 36094 + ... + 38206.

It is an arithmetic number, because the mean of its divisors is an integer number (6094662).

Almost surely, 2^78497950 is an apocalyptic number.

78497950 is a deficient number, since it is larger than the sum of its proper divisors (67773938).

78497950 is a wasteful number, since it uses less digits than its factorization.

78497950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2863 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 78497950 is about 8859.9068843865. The cubic root of 78497950 is about 428.1731583101.

The spelling of 78497950 in words is "seventy-eight million, four hundred ninety-seven thousand, nine hundred fifty".