2639788 has 6 divisors (see below), whose sum is σ = 4619636. Its totient is φ = 1319892.

The previous prime is 2639773. The next prime is 2639789. The reversal of 2639788 is 8879362.

It is not an unprimeable number, because it can be changed into a prime (2639789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329970 + ... + 329977.

2^2639788 is an apocalyptic number.

It is an amenable number.

2639788 is a deficient number, since it is larger than the sum of its proper divisors (1979848).

2639788 is a wasteful number, since it uses less digits than its factorization.

2639788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659951 (or 659949 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 2639788 is about 1624.7424411272. The cubic root of 2639788 is about 138.2047649817.

The spelling of 2639788 in words is "two million, six hundred thirty-nine thousand, seven hundred eighty-eight".