2022644640 has 48 divisors (see below), whose sum is σ = 6371332128. Its totient is φ = 539371776.

The previous prime is 2022644623. The next prime is 2022644651. The reversal of 2022644640 is 464462202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2022644598 and 2022644607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2106442 + ... + 2107401.

It is an arithmetic number, because the mean of its divisors is an integer number (132736086).

Almost surely, 2^2022644640 is an apocalyptic number.

2022644640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2022644640 is an abundant number, since it is smaller than the sum of its proper divisors (4348687488).

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

2022644640 is a wasteful number, since it uses less digits than its factorization.

2022644640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213861 (or 4213853 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 2022644640 is about 44973.8217188622. The cubic root of 2022644640 is about 1264.6582922026.

The spelling of 2022644640 in words is "two billion, twenty-two million, six hundred forty-four thousand, six hundred forty".