77705340 has 24 divisors (see below), whose sum is σ = 217575120. Its totient is φ = 20721408.

The previous prime is 77705323. The next prime is 77705357. The reversal of 77705340 is 4350777.

It is an interprime number because it is at equal distance from previous prime (77705323) and next prime (77705357).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647485 + ... + 647604.

It is an arithmetic number, because the mean of its divisors is an integer number (9065630).

Almost surely, 2^77705340 is an apocalyptic number.

It is an amenable number.

77705340 is an abundant number, since it is smaller than the sum of its proper divisors (139869780).

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

77705340 is a wasteful number, since it uses less digits than its factorization.

77705340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295101 (or 1295099 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 77705340 is about 8815.0632442428. The cubic root of 77705340 is about 426.7271629172.

The spelling of 77705340 in words is "seventy-seven million, seven hundred five thousand, three hundred forty".