78809950 has 24 divisors (see below), whose sum is σ = 146834352. Its totient is φ = 31470720.

The previous prime is 78809933. The next prime is 78809953. The reversal of 78809950 is 5990887.

It is a super-2 number, since 2×78809950² = 12422016438005000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78809950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78809953) 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, 43462 + ... + 45238.

It is an arithmetic number, because the mean of its divisors is an integer number (6118098).

Almost surely, 2^78809950 is an apocalyptic number.

78809950 is a deficient number, since it is larger than the sum of its proper divisors (68024402).

78809950 is a wasteful number, since it uses less digits than its factorization.

78809950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676 (or 2671 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 78809950 is about 8877.4968318778. The cubic root of 78809950 is about 428.7396844637.

The spelling of 78809950 in words is "seventy-eight million, eight hundred nine thousand, nine hundred fifty".