78309950 has 12 divisors (see below), whose sum is σ = 145656600. Its totient is φ = 31323960.

The previous prime is 78309949. The next prime is 78309977. The reversal of 78309950 is 5990387.

It is a super-2 number, since 2×78309950² = 12264896538005000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78309898 and 78309907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 783050 + ... + 783149.

It is an arithmetic number, because the mean of its divisors is an integer number (12138050).

Almost surely, 2^78309950 is an apocalyptic number.

78309950 is a deficient number, since it is larger than the sum of its proper divisors (67346650).

78309950 is a wasteful number, since it uses less digits than its factorization.

78309950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566211 (or 1566206 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 78309950 is about 8849.2909320465. The cubic root of 78309950 is about 427.8310648686.

The spelling of 78309950 in words is "seventy-eight million, three hundred nine thousand, nine hundred fifty".