780027780 has 48 divisors (see below), whose sum is σ = 2496090240. Its totient is φ = 178291968.

The previous prime is 780027769. The next prime is 780027803. The reversal of 780027780 is 87720087.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928185 + ... + 929024.

It is an arithmetic number, because the mean of its divisors is an integer number (52001880).

Almost surely, 2^780027780 is an apocalyptic number.

780027780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

780027780 is an abundant number, since it is smaller than the sum of its proper divisors (1716062460).

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

780027780 is a wasteful number, since it uses less digits than its factorization.

780027780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857228 (or 1857226 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 780027780 is about 27928.9774248897. The cubic root of 780027780 is about 920.5273363038.

The spelling of 780027780 in words is "seven hundred eighty million, twenty-seven thousand, seven hundred eighty".