77348638 has 4 divisors (see below), whose sum is σ = 116022960. Its totient is φ = 38674318.

The previous prime is 77348633. The next prime is 77348641. The reversal of 77348638 is 83684377.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77348633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19337158 + ... + 19337161.

It is an arithmetic number, because the mean of its divisors is an integer number (29005740).

Almost surely, 2^77348638 is an apocalyptic number.

77348638 is a deficient number, since it is larger than the sum of its proper divisors (38674322).

77348638 is a wasteful number, since it uses less digits than its factorization.

77348638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38674321.

The product of its digits is 677376, while the sum is 46.

The square root of 77348638 is about 8794.8074453054. The cubic root of 77348638 is about 426.0732055492.

The spelling of 77348638 in words is "seventy-seven million, three hundred forty-eight thousand, six hundred thirty-eight".