1820898222 has 32 divisors (see below), whose sum is σ = 4278476160. Its totient is φ = 509341920.

The previous prime is 1820898221. The next prime is 1820898223. The reversal of 1820898222 is 2228980281.

It is an interprime number because it is at equal distance from previous prime (1820898221) and next prime (1820898223).

It is a super-2 number, since 2×1820898222² = 6631340669765522568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820898221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060272 + ... + 1061987.

It is an arithmetic number, because the mean of its divisors is an integer number (133702380).

Almost surely, 2^1820898222 is an apocalyptic number.

1820898222 is an abundant number, since it is smaller than the sum of its proper divisors (2457577938).

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

1820898222 is a wasteful number, since it uses less digits than its factorization.

1820898222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122288.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 1820898222 is about 42671.9840410544. The cubic root of 1820898222 is about 1221.1299711864.

The spelling of 1820898222 in words is "one billion, eight hundred twenty million, eight hundred ninety-eight thousand, two hundred twenty-two".