77967438 has 24 divisors (see below), whose sum is σ = 158665128. Its totient is φ = 25541808.

The previous prime is 77967437. The next prime is 77967451. The reversal of 77967438 is 83476977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77967433) 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, 19020 + ... + 22752.

It is an arithmetic number, because the mean of its divisors is an integer number (6611047).

Almost surely, 2^77967438 is an apocalyptic number.

77967438 is an abundant number, since it is smaller than the sum of its proper divisors (80697690).

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

77967438 is a wasteful number, since it uses less digits than its factorization.

77967438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3797 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 51.

The square root of 77967438 is about 8829.9172136550. The cubic root of 77967438 is about 427.2064042055.

The spelling of 77967438 in words is "seventy-seven million, nine hundred sixty-seven thousand, four hundred thirty-eight".