481991890 has 16 divisors (see below), whose sum is σ = 897502680. Its totient is φ = 186148480.

The previous prime is 481991869. The next prime is 481991921. The reversal of 481991890 is 98199184.

It can be written as a sum of positive squares in 4 ways, for example, as 472671081 + 9320809 = 21741^2 + 3053^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830731 + ... + 831310.

Almost surely, 2^481991890 is an apocalyptic number.

481991890 is a deficient number, since it is larger than the sum of its proper divisors (415510790).

481991890 is a wasteful number, since it uses less digits than its factorization.

481991890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662077.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 481991890 is about 21954.3136991344. The cubic root of 481991890 is about 784.0550871070.

The spelling of 481991890 in words is "four hundred eighty-one million, nine hundred ninety-one thousand, eight hundred ninety".