78383845 has 8 divisors (see below), whose sum is σ = 94111776. Its totient is φ = 62672976.

The previous prime is 78383843. The next prime is 78383849. The reversal of 78383845 is 54838387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78383845 - 2¹ = 78383843 is a prime.

It is a super-2 number, since 2×78383845² = 12288054313968050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78383795 and 78383804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78383843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10494 + ... + 16336.

It is an arithmetic number, because the mean of its divisors is an integer number (11763972).

Almost surely, 2^78383845 is an apocalyptic number.

It is an amenable number.

78383845 is a deficient number, since it is larger than the sum of its proper divisors (15727931).

78383845 is a wasteful number, since it uses less digits than its factorization.

78383845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531.

The product of its digits is 645120, while the sum is 46.

The square root of 78383845 is about 8853.4651408361. The cubic root of 78383845 is about 427.9655928465.

The spelling of 78383845 in words is "seventy-eight million, three hundred eighty-three thousand, eight hundred forty-five".