780022222 has 32 divisors (see below), whose sum is σ = 1387638720. Its totient is φ = 321753600.

The previous prime is 780022211. The next prime is 780022231. The reversal of 780022222 is 222220087.

It is a happy number.

780022222 is a modest number, since divided by 22222 gives 7800 as remainder.

It is a congruent number.

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, 133972 + ... + 139672.

It is an arithmetic number, because the mean of its divisors is an integer number (43363710).

Almost surely, 2^780022222 is an apocalyptic number.

780022222 is the 22804-th pentagonal number.

780022222 is a deficient number, since it is larger than the sum of its proper divisors (607616498).

780022222 is a wasteful number, since it uses less digits than its factorization.

780022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6076.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 780022222 is about 27928.8779223226. The cubic root of 780022222 is about 920.5251499274.

The spelling of 780022222 in words is "seven hundred eighty million, twenty-two thousand, two hundred twenty-two".