1491333630 has 16 divisors (see below), whose sum is σ = 3579200784. Its totient is φ = 397688960.

The previous prime is 1491333607. The next prime is 1491333707. The reversal of 1491333630 is 363331941.

It is a junction number, because it is equal to n+sod(n) for n = 1491333591 and 1491333600.

It is a congruent number.

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, 24855531 + ... + 24855590.

It is an arithmetic number, because the mean of its divisors is an integer number (223700049).

Almost surely, 2^1491333630 is an apocalyptic number.

1491333630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1491333630 is an abundant number, since it is smaller than the sum of its proper divisors (2087867154).

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

1491333630 is a wasteful number, since it uses less digits than its factorization.

1491333630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49711131.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 1491333630 is about 38617.7890356245. The cubic root of 1491333630 is about 1142.5054238291.

The spelling of 1491333630 in words is "one billion, four hundred ninety-one million, three hundred thirty-three thousand, six hundred thirty".