2187709428 has 48 divisors (see below), whose sum is σ = 5144610240. Its totient is φ = 723550464.

The previous prime is 2187709411. The next prime is 2187709487. The reversal of 2187709428 is 8249077812.

2187709428 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1046208 + ... + 1048296.

It is an arithmetic number, because the mean of its divisors is an integer number (107179380).

Almost surely, 2^2187709428 is an apocalyptic number.

It is an amenable number.

2187709428 is an abundant number, since it is smaller than the sum of its proper divisors (2956900812).

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

2187709428 is a wasteful number, since it uses less digits than its factorization.

2187709428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 2187709428 is about 46772.9561605849. The cubic root of 2187709428 is about 1298.1649509467.

The spelling of 2187709428 in words is "two billion, one hundred eighty-seven million, seven hundred nine thousand, four hundred twenty-eight".