77770340 has 12 divisors (see below), whose sum is σ = 163317756. Its totient is φ = 31108128.

The previous prime is 77770313. The next prime is 77770349. The reversal of 77770340 is 4307777.

It can be written as a sum of positive squares in 2 ways, for example, as 16711744 + 61058596 = 4088^2 + 7814^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77770340.

It is not an unprimeable number, because it can be changed into a prime (77770349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944239 + ... + 1944278.

It is an arithmetic number, because the mean of its divisors is an integer number (13609813).

Almost surely, 2^77770340 is an apocalyptic number.

It is an amenable number.

77770340 is an abundant number, since it is smaller than the sum of its proper divisors (85547416).

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

77770340 is a wasteful number, since it uses less digits than its factorization.

77770340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888526 (or 3888524 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 35.

The square root of 77770340 is about 8818.7493444365. The cubic root of 77770340 is about 426.8461145670.

It can be divided in two parts, 777 and 70340, that added together give a palindrome (71117).

The spelling of 77770340 in words is "seventy-seven million, seven hundred seventy thousand, three hundred forty".