76780240 has 40 divisors (see below), whose sum is σ = 181550880. Its totient is φ = 30189696.

The previous prime is 76780237. The next prime is 76780259. The reversal of 76780240 is 4208767.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 76780196 and 76780205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3414 + ... + 12853.

It is an arithmetic number, because the mean of its divisors is an integer number (4538772).

Almost surely, 2^76780240 is an apocalyptic number.

It is an amenable number.

76780240 is an abundant number, since it is smaller than the sum of its proper divisors (104770640).

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

76780240 is a wasteful number, since it uses less digits than its factorization.

76780240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16339 (or 16333 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 76780240 is about 8762.4334519584. The cubic root of 76780240 is about 425.0269694535.

The spelling of 76780240 in words is "seventy-six million, seven hundred eighty thousand, two hundred forty".