78288895 has 16 divisors (see below), whose sum is σ = 98496000. Its totient is φ = 59624224.

The previous prime is 78288877. The next prime is 78288943. The reversal of 78288895 is 59888287.

78288895 = 1031² + 1032² + ... + 1099².

It is a cyclic number.

It is not a de Polignac number, because 78288895 - 2⁵ = 78288863 is a prime.

It is a super-3 number, since 3×78288895³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24606 + ... + 27604.

It is an arithmetic number, because the mean of its divisors is an integer number (6156000).

Almost surely, 2^78288895 is an apocalyptic number.

78288895 is a deficient number, since it is larger than the sum of its proper divisors (20207105).

78288895 is a wasteful number, since it uses less digits than its factorization.

78288895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254.

The product of its digits is 2580480, while the sum is 55.

The square root of 78288895 is about 8848.1012087340. The cubic root of 78288895 is about 427.7927181429.

The spelling of 78288895 in words is "seventy-eight million, two hundred eighty-eight thousand, eight hundred ninety-five".