77000040 has 96 divisors (see below), whose sum is σ = 269516520. Its totient is φ = 18952704.

The previous prime is 77000039. The next prime is 77000047. The reversal of 77000040 is 4000077.

It can be written as a sum of positive squares in 4 ways, for example, as 64931364 + 12068676 = 8058^2 + 3474^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 76999977 and 77000022.

It is not an unprimeable number, because it can be changed into a prime (77000047) 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, 3547 + ... + 12906.

Almost surely, 2^77000040 is an apocalyptic number.

It is an amenable number.

77000040 is an abundant number, since it is smaller than the sum of its proper divisors (192516480).

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

77000040 is a wasteful number, since it uses less digits than its factorization.

77000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16483 (or 16476 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 77000040 is about 8774.9666666034. The cubic root of 77000040 is about 425.4321601794.

The spelling of 77000040 in words is "seventy-seven million, forty", and thus it is an aban number and an uban number.