1649170990 has 32 divisors (see below), whose sum is σ = 3053617056. Its totient is φ = 641016960.

The previous prime is 1649170967. The next prime is 1649171033. The reversal of 1649170990 is 990719461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649170990.

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, 34344 + ... + 66916.

It is an arithmetic number, because the mean of its divisors is an integer number (95425533).

Almost surely, 2^1649170990 is an apocalyptic number.

1649170990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1649170990 is a deficient number, since it is larger than the sum of its proper divisors (1404446066).

1649170990 is a wasteful number, since it uses less digits than its factorization.

1649170990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32724.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 1649170990 is about 40609.9863334131. The cubic root of 1649170990 is about 1181.4678157540.

The spelling of 1649170990 in words is "one billion, six hundred forty-nine million, one hundred seventy thousand, nine hundred ninety".