1491327890 has 64 divisors (see below), whose sum is σ = 3077222400. Its totient is φ = 515496960.

The previous prime is 1491327847. The next prime is 1491327911. The reversal of 1491327890 is 987231941.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438095 + ... + 441485.

It is an arithmetic number, because the mean of its divisors is an integer number (48081600).

Almost surely, 2^1491327890 is an apocalyptic number.

1491327890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491327890 is an abundant number, since it is smaller than the sum of its proper divisors (1585894510).

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

1491327890 is a wasteful number, since it uses less digits than its factorization.

1491327890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1491327890 is about 38617.7147174713. The cubic root of 1491327890 is about 1142.5039580293.

The spelling of 1491327890 in words is "one billion, four hundred ninety-one million, three hundred twenty-seven thousand, eight hundred ninety".