1649047890 has 32 divisors (see below), whose sum is σ = 4523103360. Its totient is φ = 376925184.

The previous prime is 1649047853. The next prime is 1649047891. The reversal of 1649047890 is 987409461.

It is not an unprimeable number, because it can be changed into a prime (1649047891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3926095 + ... + 3926514.

It is an arithmetic number, because the mean of its divisors is an integer number (141346980).

Almost surely, 2^1649047890 is an apocalyptic number.

1649047890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1649047890 is an abundant number, since it is smaller than the sum of its proper divisors (2874055470).

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

1649047890 is a wasteful number, since it uses less digits than its factorization.

1649047890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852626.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1649047890 is about 40608.4706680761. The cubic root of 1649047890 is about 1181.4384186998.

The spelling of 1649047890 in words is "one billion, six hundred forty-nine million, forty-seven thousand, eight hundred ninety".