8139402 has 36 divisors (see below), whose sum is σ = 18143190. Its totient is φ = 2637120.

The previous prime is 8139377. The next prime is 8139403. The reversal of 8139402 is 2049318.

It can be written as a sum of positive squares in 3 ways, for example, as 962361 + 7177041 = 981^2 + 2679^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8139403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30124 + ... + 30392.

Almost surely, 2^8139402 is an apocalyptic number.

8139402 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8139402 is an abundant number, since it is smaller than the sum of its proper divisors (10003788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8139402 is a wasteful number, since it uses less digits than its factorization.

8139402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8139402 is about 2852.9637221668. The cubic root of 8139402 is about 201.1550003641.

The spelling of 8139402 in words is "eight million, one hundred thirty-nine thousand, four hundred two".