2190402840 has 64 divisors (see below), whose sum is σ = 6917068800. Its totient is φ = 553364352.

The previous prime is 2190402839. The next prime is 2190402853. The reversal of 2190402840 is 482040912.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2190402798 and 2190402807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478072 + ... + 482631.

It is an arithmetic number, because the mean of its divisors is an integer number (108079200).

Almost surely, 2^2190402840 is an apocalyptic number.

2190402840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190402840 is an abundant number, since it is smaller than the sum of its proper divisors (4726665960).

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

2190402840 is a wasteful number, since it uses less digits than its factorization.

2190402840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960736 (or 960732 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2190402840 is about 46801.7397112543. The cubic root of 2190402840 is about 1298.6974804016.

The spelling of 2190402840 in words is "two billion, one hundred ninety million, four hundred two thousand, eight hundred forty".