78269814 has 56 divisors (see below), whose sum is σ = 201199440. Its totient is φ = 22359888.

The previous prime is 78269809. The next prime is 78269831. The reversal of 78269814 is 41896287.

It is a super-2 number, since 2×78269814² = 12252327567189192, 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 78269814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6372 + ... + 14040.

Almost surely, 2^78269814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78269814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100599720).

78269814 is an abundant number, since it is smaller than the sum of its proper divisors (122929626).

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

78269814 is an equidigital number, since it uses as much as digits as its factorization.

78269814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7696 (or 7681 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 78269814 is about 8847.0228890853. The cubic root of 78269814 is about 427.7579606544.

The spelling of 78269814 in words is "seventy-eight million, two hundred sixty-nine thousand, eight hundred fourteen".