139266340 has 24 divisors (see below), whose sum is σ = 299594232. Its totient is φ = 54347520.

The previous prime is 139266307. The next prime is 139266341. The reversal of 139266340 is 43662931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1532644 + 137733696 = 1238^2 + 11736^2 .

It is a super-2 number, since 2×139266340² = 38790226913991200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139266296 and 139266305.

It is not an unprimeable number, because it can be changed into a prime (139266341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84099 + ... + 85738.

It is an arithmetic number, because the mean of its divisors is an integer number (12483093).

Almost surely, 2^139266340 is an apocalyptic number.

139266340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139266340 is an abundant number, since it is smaller than the sum of its proper divisors (160327892).

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

139266340 is a wasteful number, since it uses less digits than its factorization.

139266340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169887 (or 169885 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 139266340 is about 11801.1160489167. The cubic root of 139266340 is about 518.3407913329.

The spelling of 139266340 in words is "one hundred thirty-nine million, two hundred sixty-six thousand, three hundred forty".