77018040 has 160 divisors (see below), whose sum is σ = 282530160. Its totient is φ = 18662400.

The previous prime is 77018033. The next prime is 77018047. The reversal of 77018040 is 4081077.

It is an interprime number because it is at equal distance from previous prime (77018033) and next prime (77018047).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 77017995 and 77018013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77018047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34560 + ... + 36720.

Almost surely, 2^77018040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77018040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141265080).

77018040 is an abundant number, since it is smaller than the sum of its proper divisors (205512120).

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

77018040 is a wasteful number, since it uses less digits than its factorization.

77018040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 77018040 is about 8775.9922515918. The cubic root of 77018040 is about 425.4653081373.

The spelling of 77018040 in words is "seventy-seven million, eighteen thousand, forty".