2891951340 has 48 divisors (see below), whose sum is σ = 8376691680. Its totient is φ = 744593920.

The previous prime is 2891951323. The next prime is 2891951357. The reversal of 2891951340 is 431591982.

It is an interprime number because it is at equal distance from previous prime (2891951323) and next prime (2891951357).

It is a junction number, because it is equal to n+sod(n) for n = 2891951292 and 2891951301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829281 + ... + 832760.

It is an arithmetic number, because the mean of its divisors is an integer number (174514410).

Almost surely, 2^2891951340 is an apocalyptic number.

2891951340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2891951340 is an abundant number, since it is smaller than the sum of its proper divisors (5484740340).

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

2891951340 is a wasteful number, since it uses less digits than its factorization.

2891951340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662082 (or 1662080 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 2891951340 is about 53776.8662158739. The cubic root of 2891951340 is about 1424.7226446969.

The spelling of 2891951340 in words is "two billion, eight hundred ninety-one million, nine hundred fifty-one thousand, three hundred forty".