1822666440 has 64 divisors (see below), whose sum is σ = 6249144960. Its totient is φ = 416609280.

The previous prime is 1822666429. The next prime is 1822666451. The reversal of 1822666440 is 446662281.

It is an interprime number because it is at equal distance from previous prime (1822666429) and next prime (1822666451).

It is a super-2 number, since 2×1822666440² = 6644225903004547200, which contains 22 as substring.

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, 1084081 + ... + 1085760.

It is an arithmetic number, because the mean of its divisors is an integer number (97642890).

Almost surely, 2^1822666440 is an apocalyptic number.

1822666440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1822666440 is an abundant number, since it is smaller than the sum of its proper divisors (4426478520).

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

1822666440 is a wasteful number, since it uses less digits than its factorization.

1822666440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169862 (or 2169858 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 1822666440 is about 42692.6977362640. The cubic root of 1822666440 is about 1221.5251105060.

It can be divided in two parts, 18226 and 66440, that added together give a triangular number (84666 = T₄₁₁).

The spelling of 1822666440 in words is "one billion, eight hundred twenty-two million, six hundred sixty-six thousand, four hundred forty".