155398 has 4 divisors (see below), whose sum is σ = 233100. Its totient is φ = 77698.

The previous prime is 155387. The next prime is 155399. The reversal of 155398 is 893551.

155398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38848 + ... + 38851.

It is an arithmetic number, because the mean of its divisors is an integer number (58275).

2¹⁵⁵³⁹⁸ is an apocalyptic number.

155398 is a deficient number, since it is larger than the sum of its proper divisors (77702).

155398 is an equidigital number, since it uses as much as digits as its factorization.

155398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77701.

The product of its digits is 5400, while the sum is 31.

The square root of 155398 is about 394.2055301489. The cubic root of 155398 is about 53.7627912590.

The spelling of 155398 in words is "one hundred fifty-five thousand, three hundred ninety-eight".