78840598 has 16 divisors (see below), whose sum is σ = 119667456. Its totient is φ = 38954560.

The previous prime is 78840583. The next prime is 78840613. The reversal of 78840598 is 89504887.

It is an interprime number because it is at equal distance from previous prime (78840583) and next prime (78840613).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65490 + ... + 66682.

It is an arithmetic number, because the mean of its divisors is an integer number (7479216).

Almost surely, 2^78840598 is an apocalyptic number.

78840598 is a deficient number, since it is larger than the sum of its proper divisors (40826858).

78840598 is a wasteful number, since it uses less digits than its factorization.

78840598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 78840598 is about 8879.2228263514. Note that the first 3 decimals coincide. The cubic root of 78840598 is about 428.7952540582.

The spelling of 78840598 in words is "seventy-eight million, eight hundred forty thousand, five hundred ninety-eight".