138153802 has 8 divisors (see below), whose sum is σ = 209367396. Its totient is φ = 68364672.

The previous prime is 138153793. The next prime is 138153803. The reversal of 138153802 is 208351831.

It can be written as a sum of positive squares in 2 ways, for example, as 128845201 + 9308601 = 11351^2 + 3051^2 .

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

It is not an unprimeable number, because it can be changed into a prime (138153803) 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, 355873 + ... + 356260.

Almost surely, 2^138153802 is an apocalyptic number.

138153802 is a deficient number, since it is larger than the sum of its proper divisors (71213594).

138153802 is an equidigital number, since it uses as much as digits as its factorization.

138153802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712232.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 138153802 is about 11753.8845493735. The cubic root of 138153802 is about 516.9568333776.

The spelling of 138153802 in words is "one hundred thirty-eight million, one hundred fifty-three thousand, eight hundred two".