877780379 has 16 divisors (see below), whose sum is σ = 1018195200. Its totient is φ = 741200544.

The previous prime is 877780339. The next prime is 877780399. The reversal of 877780379 is 973087778.

It is a de Polignac number, because none of the positive numbers 2^k-877780379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (877780339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133364 + ... + 139790.

It is an arithmetic number, because the mean of its divisors is an integer number (63637200).

Almost surely, 2^877780379 is an apocalyptic number.

877780379 is a deficient number, since it is larger than the sum of its proper divisors (140414821).

877780379 is a wasteful number, since it uses less digits than its factorization.

877780379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722.

The product of its (nonzero) digits is 4148928, while the sum is 56.

The square root of 877780379 is about 29627.3586234075. The cubic root of 877780379 is about 957.4776009322.

The spelling of 877780379 in words is "eight hundred seventy-seven million, seven hundred eighty thousand, three hundred seventy-nine".