152390138 has 8 divisors (see below), whose sum is σ = 229746132. Its totient is φ = 75808096.

The previous prime is 152390137. The next prime is 152390191. The reversal of 152390138 is 831093251.

152390138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 113912929 + 38477209 = 10673^2 + 6203^2 .

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

It is a super-3 number, since 3×152390138³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (152390137) 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, 192995 + ... + 193782.

Almost surely, 2^152390138 is an apocalyptic number.

152390138 is a deficient number, since it is larger than the sum of its proper divisors (77355994).

152390138 is a wasteful number, since it uses less digits than its factorization.

152390138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386976.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 152390138 is about 12344.6400514555. The cubic root of 152390138 is about 534.1365382830.

The spelling of 152390138 in words is "one hundred fifty-two million, three hundred ninety thousand, one hundred thirty-eight".