77829438 has 8 divisors (see below), whose sum is σ = 155658888. Its totient is φ = 25943144.

The previous prime is 77829421. The next prime is 77829467. The reversal of 77829438 is 83492877.

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

77829438 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6485781 + ... + 6485792.

It is an arithmetic number, because the mean of its divisors is an integer number (19457361).

Almost surely, 2^77829438 is an apocalyptic number.

77829438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77829438 is a wasteful number, since it uses less digits than its factorization.

77829438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971578.

The product of its digits is 677376, while the sum is 48.

The square root of 77829438 is about 8822.0994100044. The cubic root of 77829438 is about 426.9542078952.

The spelling of 77829438 in words is "seventy-seven million, eight hundred twenty-nine thousand, four hundred thirty-eight".