155428090 has 8 divisors (see below), whose sum is σ = 279770580. Its totient is φ = 62171232.

The previous prime is 155428073. The next prime is 155428099. The reversal of 155428090 is 90824551.

155428090 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 155027401 + 400689 = 12451^2 + 633^2 .

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

It is a super-2 number, since 2×155428090² = 48315782322096200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155428099) 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, 7771395 + ... + 7771414.

Almost surely, 2^155428090 is an apocalyptic number.

155428090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155428090 is a deficient number, since it is larger than the sum of its proper divisors (124342490).

155428090 is a wasteful number, since it uses less digits than its factorization.

155428090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15542816.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 155428090 is about 12467.0802516066. The cubic root of 155428090 is about 537.6626109767.

It can be divided in two parts, 15542 and 8090, that added together give a palindrome (23632).

The spelling of 155428090 in words is "one hundred fifty-five million, four hundred twenty-eight thousand, ninety".