780533680 has 40 divisors (see below), whose sum is σ = 1910257200. Its totient is φ = 295780608.

The previous prime is 780533671. The next prime is 780533713. The reversal of 780533680 is 86335087.

780533680 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×780533680² = 1218465651228684800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255235 + ... + 258274.

It is an arithmetic number, because the mean of its divisors is an integer number (47756430).

Almost surely, 2^780533680 is an apocalyptic number.

It is an amenable number.

780533680 is an abundant number, since it is smaller than the sum of its proper divisors (1129723520).

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

780533680 is a wasteful number, since it uses less digits than its factorization.

780533680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513541 (or 513535 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 780533680 is about 27938.0328584530. The cubic root of 780533680 is about 920.7263010713.

The spelling of 780533680 in words is "seven hundred eighty million, five hundred thirty-three thousand, six hundred eighty".