2639402 has 8 divisors (see below), whose sum is σ = 4086912. Its totient is φ = 1277100.

The previous prime is 2639401. The next prime is 2639407. The reversal of 2639402 is 2049362.

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

It is a d-powerful number, because it can be written as 2³ + 6⁷ + 3⁴ + 9² + 4⁹ + 0 + 2²¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21224 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (510864).

2^2639402 is an apocalyptic number.

2639402 is a deficient number, since it is larger than the sum of its proper divisors (1447510).

2639402 is a wasteful number, since it uses less digits than its factorization.

2639402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42604.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 2639402 is about 1624.6236487261. The cubic root of 2639402 is about 138.1980283751.

The spelling of 2639402 in words is "two million, six hundred thirty-nine thousand, four hundred two".