501445890 has 160 divisors (see below), whose sum is σ = 1484106624. Its totient is φ = 120476160.

The previous prime is 501445877. The next prime is 501445909. The reversal of 501445890 is 98544105.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1487802 + ... + 1488138.

Almost surely, 2^501445890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501445890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742053312).

501445890 is an abundant number, since it is smaller than the sum of its proper divisors (982660734).

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

501445890 is a wasteful number, since it uses less digits than its factorization.

501445890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 501445890 is about 22392.9875184175. The cubic root of 501445890 is about 794.4648587984.

Adding to 501445890 its reverse (98544105), we get a palindrome (599989995).

The spelling of 501445890 in words is "five hundred one million, four hundred forty-five thousand, eight hundred ninety".