78297845 has 8 divisors (see below), whose sum is σ = 94174080. Its totient is φ = 62493840.

The previous prime is 78297827. The next prime is 78297959. The reversal of 78297845 is 54879287.

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

It is not a de Polignac number, because 78297845 - 2⁶ = 78297781 is a prime.

It is a super-2 number, since 2×78297845² = 12261105063288050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78297793 and 78297802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15641 + ... + 20030.

It is an arithmetic number, because the mean of its divisors is an integer number (11771760).

Almost surely, 2^78297845 is an apocalyptic number.

It is an amenable number.

78297845 is a deficient number, since it is larger than the sum of its proper divisors (15876235).

78297845 is a wasteful number, since it uses less digits than its factorization.

78297845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36115.

The product of its digits is 1128960, while the sum is 50.

The square root of 78297845 is about 8848.6069525095. The cubic root of 78297845 is about 427.8090193009.

The spelling of 78297845 in words is "seventy-eight million, two hundred ninety-seven thousand, eight hundred forty-five".