77730040 has 16 divisors (see below), whose sum is σ = 174892680. Its totient is φ = 31092000.

The previous prime is 77730017. The next prime is 77730047. The reversal of 77730040 is 4003777.

It is a junction number, because it is equal to n+sod(n) for n = 77729990 and 77730008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77730047) 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, 971586 + ... + 971665.

Almost surely, 2^77730040 is an apocalyptic number.

It is an amenable number.

77730040 is an abundant number, since it is smaller than the sum of its proper divisors (97162640).

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

77730040 is a wasteful number, since it uses less digits than its factorization.

77730040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943262 (or 1943258 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 77730040 is about 8816.4641438618. The cubic root of 77730040 is about 426.7723723555.

The spelling of 77730040 in words is "seventy-seven million, seven hundred thirty thousand, forty".