155728434 has 32 divisors (see below), whose sum is σ = 326304000. Its totient is φ = 49480704.

The previous prime is 155728387. The next prime is 155728439. The reversal of 155728434 is 434827551.

It is a junction number, because it is equal to n+sod(n) for n = 155728392 and 155728401.

It is not an unprimeable number, because it can be changed into a prime (155728439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8082 + ... + 19410.

It is an arithmetic number, because the mean of its divisors is an integer number (10197000).

Almost surely, 2^155728434 is an apocalyptic number.

155728434 is an abundant number, since it is smaller than the sum of its proper divisors (170575566).

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

155728434 is a wasteful number, since it uses less digits than its factorization.

155728434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11442.

The product of its digits is 134400, while the sum is 39.

The square root of 155728434 is about 12479.1199208919. The cubic root of 155728434 is about 538.0087085096.

The spelling of 155728434 in words is "one hundred fifty-five million, seven hundred twenty-eight thousand, four hundred thirty-four".