77434938 has 24 divisors (see below), whose sum is σ = 191743968. Its totient is φ = 22124232.

The previous prime is 77434927. The next prime is 77434967. The reversal of 77434938 is 83943477.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77434893 and 77434902.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307156 + ... + 307407.

It is an arithmetic number, because the mean of its divisors is an integer number (7989332).

Almost surely, 2^77434938 is an apocalyptic number.

77434938 is an abundant number, since it is smaller than the sum of its proper divisors (114309030).

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

77434938 is a wasteful number, since it uses less digits than its factorization.

77434938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614578 (or 614575 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 77434938 is about 8799.7123816634. The cubic root of 77434938 is about 426.2316071790.

The spelling of 77434938 in words is "seventy-seven million, four hundred thirty-four thousand, nine hundred thirty-eight".