78288628734 has 32 divisors (see below), whose sum is σ = 174033684000. Its totient is φ = 26087366592.

The previous prime is 78288628721. The next prime is 78288628741. The reversal of 78288628734 is 43782688287.

78288628734 is a `hidden beast` number, since 78 + 288 + 6 + 287 + 3 + 4 = 666.

It is a super-2 number, since 2×78288628734² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83829 + ... + 404480.

It is an arithmetic number, because the mean of its divisors is an integer number (5438552625).

Almost surely, 2^78288628734 is an apocalyptic number.

78288628734 is an abundant number, since it is smaller than the sum of its proper divisors (95745055266).

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

78288628734 is a wasteful number, since it uses less digits than its factorization.

78288628734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491289 (or 491283 counting only the distinct ones).

The product of its digits is 57802752, while the sum is 63.

The spelling of 78288628734 in words is "seventy-eight billion, two hundred eighty-eight million, six hundred twenty-eight thousand, seven hundred thirty-four".