1812002940 has 384 divisors, whose sum is σ = 6497971200. Its totient is φ = 415134720.

The previous prime is 1812002839. The next prime is 1812002977. The reversal of 1812002940 is 492002181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11541342 + ... + 11541498.

It is an arithmetic number, because the mean of its divisors is an integer number (16921800).

Almost surely, 2^1812002940 is an apocalyptic number.

1812002940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812002940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3248985600).

1812002940 is an abundant number, since it is smaller than the sum of its proper divisors (4685968260).

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

1812002940 is a wasteful number, since it uses less digits than its factorization.

1812002940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1812002940 is about 42567.6278408840. The cubic root of 1812002940 is about 1219.1382743953.

The spelling of 1812002940 in words is "one billion, eight hundred twelve million, two thousand, nine hundred forty".