690021222 has 16 divisors (see below), whose sum is σ = 1505500992. Its totient is φ = 209097320.

The previous prime is 690021173. The next prime is 690021329. The reversal of 690021222 is 222120096.

It is a super-2 number, since 2×690021222² = 952258573620746568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690021192 and 690021201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5227368 + ... + 5227499.

It is an arithmetic number, because the mean of its divisors is an integer number (94093812).

Almost surely, 2^690021222 is an apocalyptic number.

690021222 is an abundant number, since it is smaller than the sum of its proper divisors (815479770).

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

690021222 is a wasteful number, since it uses less digits than its factorization.

690021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10454883.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 690021222 is about 26268.2550238877. The cubic root of 690021222 is about 883.6646515383.

The spelling of 690021222 in words is "six hundred ninety million, twenty-one thousand, two hundred twenty-two".