1890089644 has 6 divisors (see below), whose sum is σ = 3307656884. Its totient is φ = 945044820.

The previous prime is 1890089633. The next prime is 1890089671. The reversal of 1890089644 is 4469800981.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236261202 + ... + 236261209.

Almost surely, 2^1890089644 is an apocalyptic number.

It is an amenable number.

1890089644 is a deficient number, since it is larger than the sum of its proper divisors (1417567240).

1890089644 is a wasteful number, since it uses less digits than its factorization.

1890089644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472522415 (or 472522413 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1890089644 is about 43475.1612302933. The cubic root of 1890089644 is about 1236.4051371732.

The spelling of 1890089644 in words is "one billion, eight hundred ninety million, eighty-nine thousand, six hundred forty-four".