78829641 has 12 divisors (see below), whose sum is σ = 124216560. Its totient is φ = 47775480.

The previous prime is 78829633. The next prime is 78829649. The reversal of 78829641 is 14692887.

It is an interprime number because it is at equal distance from previous prime (78829633) and next prime (78829649).

It is not a de Polignac number, because 78829641 - 2³ = 78829633 is a prime.

It is a super-2 number, since 2×78829641² = 12428224600377762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78829649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398031 + ... + 398228.

It is an arithmetic number, because the mean of its divisors is an integer number (10351380).

Almost surely, 2^78829641 is an apocalyptic number.

It is an amenable number.

78829641 is a deficient number, since it is larger than the sum of its proper divisors (45386919).

78829641 is a wasteful number, since it uses less digits than its factorization.

78829641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796276 (or 796273 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 78829641 is about 8878.6058027147. The cubic root of 78829641 is about 428.7753889659.

The spelling of 78829641 in words is "seventy-eight million, eight hundred twenty-nine thousand, six hundred forty-one".