2190487834 has 4 divisors (see below), whose sum is σ = 3285731754. Its totient is φ = 1095243916.

The previous prime is 2190487799. The next prime is 2190487837. The reversal of 2190487834 is 4387840912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2134162809 + 56325025 = 46197^2 + 7505^2 .

It is not an unprimeable number, because it can be changed into a prime (2190487837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547621957 + ... + 547621960.

Almost surely, 2^2190487834 is an apocalyptic number.

2190487834 is a deficient number, since it is larger than the sum of its proper divisors (1095243920).

2190487834 is a wasteful number, since it uses less digits than its factorization.

2190487834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095243919.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 2190487834 is about 46802.6477242474. The cubic root of 2190487834 is about 1298.7142779307.

The spelling of 2190487834 in words is "two billion, one hundred ninety million, four hundred eighty-seven thousand, eight hundred thirty-four".