155879138 has 8 divisors (see below), whose sum is σ = 234030288. Its totient is φ = 77869044.

The previous prime is 155879099. The next prime is 155879149. The reversal of 155879138 is 831978551.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155879092 and 155879101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32456 + ... + 36947.

It is an arithmetic number, because the mean of its divisors is an integer number (29253786).

Almost surely, 2^155879138 is an apocalyptic number.

155879138 is a deficient number, since it is larger than the sum of its proper divisors (78151150).

155879138 is a wasteful number, since it uses less digits than its factorization.

155879138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70528.

The product of its digits is 302400, while the sum is 47.

The square root of 155879138 is about 12485.1567070662. The cubic root of 155879138 is about 538.1822026744.

The spelling of 155879138 in words is "one hundred fifty-five million, eight hundred seventy-nine thousand, one hundred thirty-eight".