2639457 has 24 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 1636800.

The previous prime is 2639447. The next prime is 2639477. The reversal of 2639457 is 7549362.

It is not a de Polignac number, because 2639457 - 2⁶ = 2639393 is a prime.

It is an Ulam number.

Its product of digits (45360) is a multiple of the sum of its prime divisors (378).

It is not an unprimeable number, because it can be changed into a prime (2639407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8332 + ... + 8642.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2^2639457 is an apocalyptic number.

It is an amenable number.

2639457 is a deficient number, since it is larger than the sum of its proper divisors (1448991).

2639457 is a wasteful number, since it uses less digits than its factorization.

2639457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 378 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2639457 is about 1624.6405756351. The cubic root of 2639457 is about 138.1989882944.

The spelling of 2639457 in words is "two million, six hundred thirty-nine thousand, four hundred fifty-seven".