78363805 has 32 divisors (see below), whose sum is σ = 104799744. Its totient is φ = 55888896.

The previous prime is 78363797. The next prime is 78363811. The reversal of 78363805 is 50836387.

It is not a de Polignac number, because 78363805 - 2³ = 78363797 is a prime.

It is a super-2 number, since 2×78363805² = 12281771868156050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345102 + ... + 345328.

It is an arithmetic number, because the mean of its divisors is an integer number (3274992).

Almost surely, 2^78363805 is an apocalyptic number.

It is an amenable number.

78363805 is a deficient number, since it is larger than the sum of its proper divisors (26435939).

78363805 is a wasteful number, since it uses less digits than its factorization.

78363805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 78363805 is about 8852.3333082301. Note that the first 4 decimals coincide. The cubic root of 78363805 is about 427.9291178072.

The spelling of 78363805 in words is "seventy-eight million, three hundred sixty-three thousand, eight hundred five".