1644492034 has 4 divisors (see below), whose sum is σ = 2466738054. Its totient is φ = 822246016.

The previous prime is 1644491983. The next prime is 1644492041. The reversal of 1644492034 is 4302944461.

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., 1056575025 + 587917009 = 32505^2 + 24247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1644491984 and 1644492002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411123007 + ... + 411123010.

Almost surely, 2^1644492034 is an apocalyptic number.

1644492034 is a deficient number, since it is larger than the sum of its proper divisors (822246020).

1644492034 is an equidigital number, since it uses as much as digits as its factorization.

1644492034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822246019.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 1644492034 is about 40552.3369733484. The cubic root of 1644492034 is about 1180.3494210813.

The spelling of 1644492034 in words is "one billion, six hundred forty-four million, four hundred ninety-two thousand, thirty-four".