77282865 has 24 divisors (see below), whose sum is σ = 146135808. Its totient is φ = 37470240.

The previous prime is 77282789. The next prime is 77282869. The reversal of 77282865 is 56828277.

It is not a de Polignac number, because 77282865 - 2¹¹ = 77280817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 77282865.

It is not an unprimeable number, because it can be changed into a prime (77282869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77569 + ... + 78558.

It is an arithmetic number, because the mean of its divisors is an integer number (6088992).

Almost surely, 2^77282865 is an apocalyptic number.

It is an amenable number.

77282865 is a deficient number, since it is larger than the sum of its proper divisors (68852943).

77282865 is a wasteful number, since it uses less digits than its factorization.

77282865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156149 (or 156146 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 77282865 is about 8791.0673413414. The cubic root of 77282865 is about 425.9524016117.

The spelling of 77282865 in words is "seventy-seven million, two hundred eighty-two thousand, eight hundred sixty-five".