2173789440 has 288 divisors, whose sum is σ = 7966694400. Its totient is φ = 560701440.

The previous prime is 2173789421. The next prime is 2173789483. The reversal of 2173789440 is 449873712.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1070346 + ... + 1072374.

Almost surely, 2^2173789440 is an apocalyptic number.

2173789440 is a gapful number since it is divisible by the number (20) 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 2173789440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3983347200).

2173789440 is an abundant number, since it is smaller than the sum of its proper divisors (5792904960).

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

2173789440 is a wasteful number, since it uses less digits than its factorization.

2173789440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2173789440 is about 46623.9148935393. The cubic root of 2173789440 is about 1295.4057632399.

The spelling of 2173789440 in words is "two billion, one hundred seventy-three million, seven hundred eighty-nine thousand, four hundred forty".