1491380156 has 12 divisors (see below), whose sum is σ = 2982760368. Its totient is φ = 639162912.

The previous prime is 1491380153. The next prime is 1491380173. The reversal of 1491380156 is 6510831941.

1491380156 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491380153) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26631761 + ... + 26631816.

It is an arithmetic number, because the mean of its divisors is an integer number (248563364).

Almost surely, 2^1491380156 is an apocalyptic number.

It is an amenable number.

1491380156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1491380156 is a wasteful number, since it uses less digits than its factorization.

1491380156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53263588 (or 53263586 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1491380156 is about 38618.3914217048. The cubic root of 1491380156 is about 1142.5173048403.

The spelling of 1491380156 in words is "one billion, four hundred ninety-one million, three hundred eighty thousand, one hundred fifty-six".