2889789840 has 120 divisors (see below), whose sum is σ = 11091307968. Its totient is φ = 660522240.

The previous prime is 2889789821. The next prime is 2889789841. The reversal of 2889789840 is 489879882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2889789841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281646 + ... + 291725.

Almost surely, 2^2889789840 is an apocalyptic number.

2889789840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2889789840 is an abundant number, since it is smaller than the sum of its proper divisors (8201518128).

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

2889789840 is a wasteful number, since it uses less digits than its factorization.

2889789840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573397 (or 573388 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The square root of 2889789840 is about 53756.7655276989. The cubic root of 2889789840 is about 1424.3676011999.

The spelling of 2889789840 in words is "two billion, eight hundred eighty-nine million, seven hundred eighty-nine thousand, eight hundred forty".