10202639 has 16 divisors (see below), whose sum is σ = 11527680. Its totient is φ = 8981280.

The previous prime is 10202623. The next prime is 10202641. The reversal of 10202639 is 93620201.

It is a cyclic number.

It is not a de Polignac number, because 10202639 - 2⁴ = 10202623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202939) 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, 15854 + ... + 16484.

It is an arithmetic number, because the mean of its divisors is an integer number (720480).

Almost surely, 2^10202639 is an apocalyptic number.

10202639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10202639 is a deficient number, since it is larger than the sum of its proper divisors (1325041).

10202639 is a wasteful number, since it uses less digits than its factorization.

10202639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 10202639 is about 3194.1570092906. The cubic root of 10202639 is about 216.8889902028. Note that the first 3 decimals are identical.

The spelling of 10202639 in words is "ten million, two hundred two thousand, six hundred thirty-nine".