1491040812 has 24 divisors (see below), whose sum is σ = 3536131312. Its totient is φ = 488865600.

The previous prime is 1491040787. The next prime is 1491040819. The reversal of 1491040812 is 2180401941.

It is a self number, because there is not a number n which added to its sum of digits gives 1491040812.

It is not an unprimeable number, because it can be changed into a prime (1491040819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017739 + ... + 1019202.

Almost surely, 2^1491040812 is an apocalyptic number.

1491040812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1491040812 is an abundant number, since it is smaller than the sum of its proper divisors (2045090500).

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

1491040812 is a wasteful number, since it uses less digits than its factorization.

1491040812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037009 (or 2037007 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1491040812 is about 38613.9976174444. The cubic root of 1491040812 is about 1142.4306433229.

The spelling of 1491040812 in words is "one billion, four hundred ninety-one million, forty thousand, eight hundred twelve".