155434398 has 16 divisors (see below), whose sum is σ = 355278720. Its totient is φ = 44409816.

The previous prime is 155434381. The next prime is 155434399. The reversal of 155434398 is 893434551.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3700819 = 155434398 / (1 + 5 + 5 + 4 + 3 + 4 + 3 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155434399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850368 + ... + 1850451.

It is an arithmetic number, because the mean of its divisors is an integer number (22204920).

Almost surely, 2^155434398 is an apocalyptic number.

155434398 is an abundant number, since it is smaller than the sum of its proper divisors (199844322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155434398 is a wasteful number, since it uses less digits than its factorization.

155434398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700831.

The product of its digits is 259200, while the sum is 42.

The square root of 155434398 is about 12467.3332352994. Note that the first 3 decimals coincide. The cubic root of 155434398 is about 537.6698845008.

The spelling of 155434398 in words is "one hundred fifty-five million, four hundred thirty-four thousand, three hundred ninety-eight".