2856945 has 72 divisors (see below), whose sum is σ = 6008256. Its totient is φ = 1153152.

The previous prime is 2856923. The next prime is 2856961. The reversal of 2856945 is 5496582.

It is not a de Polignac number, because 2856945 - 2¹² = 2852849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

2856945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 124204 + ... + 124226.

It is an arithmetic number, because the mean of its divisors is an integer number (83448).

2^2856945 is an apocalyptic number.

It is an amenable number.

2856945 is an abundant number, since it is smaller than the sum of its proper divisors (3151311).

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

2856945 is a wasteful number, since it uses less digits than its factorization.

2856945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 51 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 2856945 is about 1690.2499815116. The cubic root of 2856945 is about 141.8950656347.

The spelling of 2856945 in words is "two million, eight hundred fifty-six thousand, nine hundred forty-five".