1491444020 has 48 divisors (see below), whose sum is σ = 3463604928. Its totient is φ = 534908160.

The previous prime is 1491443981. The next prime is 1491444041. The reversal of 1491444020 is 204441941.

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, 30374 + ... + 62493.

It is an arithmetic number, because the mean of its divisors is an integer number (72158436).

Almost surely, 2^1491444020 is an apocalyptic number.

1491444020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491444020 is an abundant number, since it is smaller than the sum of its proper divisors (1972160908).

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

1491444020 is a wasteful number, since it uses less digits than its factorization.

1491444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92960 (or 92958 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1491444020 is about 38619.2182727719. The cubic root of 1491444020 is about 1142.5336129299.

Adding to 1491444020 its reverse (204441941), we get a palindrome (1695885961).

The spelling of 1491444020 in words is "one billion, four hundred ninety-one million, four hundred forty-four thousand, twenty".