1491896940 has 48 divisors (see below), whose sum is σ = 4210225152. Its totient is φ = 394704576.

The previous prime is 1491896933. The next prime is 1491896953. The reversal of 1491896940 is 496981941.

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, 90274 + ... + 105513.

It is an arithmetic number, because the mean of its divisors is an integer number (87713024).

Almost surely, 2^1491896940 is an apocalyptic number.

1491896940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491896940 is an abundant number, since it is smaller than the sum of its proper divisors (2718328212).

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

1491896940 is a wasteful number, since it uses less digits than its factorization.

1491896940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195926 (or 195924 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1491896940 is about 38625.0817474863. The cubic root of 1491896940 is about 1142.6492556546.

The spelling of 1491896940 in words is "one billion, four hundred ninety-one million, eight hundred ninety-six thousand, nine hundred forty".