2864457 has 16 divisors (see below), whose sum is σ = 4270080. Its totient is φ = 1897776.

The previous prime is 2864453. The next prime is 2864467. The reversal of 2864457 is 7544682.

2864457 is a `hidden beast` number, since 2 + 8 + 644 + 5 + 7 = 666.

It is not a de Polignac number, because 2864457 - 2² = 2864453 is a prime.

It is a super-2 number, since 2×2864457² = 16410227809698, which contains 22 as substring.

It is an Ulam number.

2864457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2864453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7288 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (266880).

2^2864457 is an apocalyptic number.

2864457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2864457 is a deficient number, since it is larger than the sum of its proper divisors (1405623).

2864457 is a wasteful number, since it uses less digits than its factorization.

2864457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 663 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 2864457 is about 1692.4706792143. The cubic root of 2864457 is about 142.0193222401.

Subtracting from 2864457 its sum of digits (36), we obtain a triangular number (2864421 = T₂₃₉₃).

It can be divided in two parts, 2864 and 457, that added together give a triangular number (3321 = T₈₁).

The spelling of 2864457 in words is "two million, eight hundred sixty-four thousand, four hundred fifty-seven".