2781871401 has 8 divisors (see below), whose sum is σ = 3715042624. Its totient is φ = 1851640560.

The previous prime is 2781871387. The next prime is 2781871427. The reversal of 2781871401 is 1041781872.

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

It is not a de Polignac number, because 2781871401 - 2²³ = 2773482793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2781871401.

It is not an unprimeable number, because it can be changed into a prime (2781871441) 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, 732886 + ... + 736671.

It is an arithmetic number, because the mean of its divisors is an integer number (464380328).

Almost surely, 2^2781871401 is an apocalyptic number.

It is an amenable number.

2781871401 is a deficient number, since it is larger than the sum of its proper divisors (933171223).

2781871401 is a wasteful number, since it uses less digits than its factorization.

2781871401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470191.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 2781871401 is about 52743.4488917818. The cubic root of 2781871401 is about 1406.4113090059.

The spelling of 2781871401 in words is "two billion, seven hundred eighty-one million, eight hundred seventy-one thousand, four hundred one".