2891493890 has 8 divisors (see below), whose sum is σ = 5204689020. Its totient is φ = 1156597552.

The previous prime is 2891493883. The next prime is 2891493911. The reversal of 2891493890 is 983941982.

It can be written as a sum of positive squares in 2 ways, for example, as 2746074409 + 145419481 = 52403^2 + 12059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144574685 + ... + 144574704.

Almost surely, 2^2891493890 is an apocalyptic number.

2891493890 is a deficient number, since it is larger than the sum of its proper divisors (2313195130).

2891493890 is a wasteful number, since it uses less digits than its factorization.

2891493890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289149396.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 2891493890 is about 53772.6128247456. The cubic root of 2891493890 is about 1424.6475196729.

The spelling of 2891493890 in words is "two billion, eight hundred ninety-one million, four hundred ninety-three thousand, eight hundred ninety".