787220778 has 8 divisors (see below), whose sum is σ = 1574441568. Its totient is φ = 262406924.

The previous prime is 787220773. The next prime is 787220809. The reversal of 787220778 is 877022787.

It is a sphenic number, since it is the product of 3 distinct primes.

787220778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (787220771) 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, 65601726 + ... + 65601737.

It is an arithmetic number, because the mean of its divisors is an integer number (196805196).

Almost surely, 2^787220778 is an apocalyptic number.

787220778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

787220778 is a wasteful number, since it uses less digits than its factorization.

787220778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131203468.

The product of its (nonzero) digits is 614656, while the sum is 48.

The square root of 787220778 is about 28057.4549451656. The cubic root of 787220778 is about 923.3482196276.

The spelling of 787220778 in words is "seven hundred eighty-seven million, two hundred twenty thousand, seven hundred seventy-eight".