138415232 has 16 divisors (see below), whose sum is σ = 275749350. Its totient is φ = 69207552.

The previous prime is 138415229. The next prime is 138415253. The reversal of 138415232 is 232514831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 135117376 + 3297856 = 11624^2 + 1816^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×138415232² = 38317552899227648, which contains 22 as substring.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 138415195 and 138415204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540557 + ... + 540812.

Almost surely, 2^138415232 is an apocalyptic number.

It is an amenable number.

138415232 is a deficient number, since it is larger than the sum of its proper divisors (137334118).

138415232 is an equidigital number, since it uses as much as digits as its factorization.

138415232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081383 (or 1081371 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 138415232 is about 11765.0002974926. Note that the first 3 decimals coincide. The cubic root of 138415232 is about 517.2827089963.

The spelling of 138415232 in words is "one hundred thirty-eight million, four hundred fifteen thousand, two hundred thirty-two".