77565340 has 12 divisors (see below), whose sum is σ = 162887256. Its totient is φ = 31026128.

The previous prime is 77565337. The next prime is 77565359. The reversal of 77565340 is 4356577.

It is a self number, because there is not a number n which added to its sum of digits gives 77565340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939114 + ... + 1939153.

It is an arithmetic number, because the mean of its divisors is an integer number (13573938).

Almost surely, 2^77565340 is an apocalyptic number.

It is an amenable number.

77565340 is an abundant number, since it is smaller than the sum of its proper divisors (85321916).

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

77565340 is a wasteful number, since it uses less digits than its factorization.

77565340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878276 (or 3878274 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 77565340 is about 8807.1187115878. The cubic root of 77565340 is about 426.4707338770.

The spelling of 77565340 in words is "seventy-seven million, five hundred sixty-five thousand, three hundred forty".