155727090 has 64 divisors (see below), whose sum is σ = 420336000. Its totient is φ = 41020992.

The previous prime is 155727053. The next prime is 155727113. The reversal of 155727090 is 90727551.

155727090 is a `hidden beast` number, since 15 + 572 + 70 + 9 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18936 + ... + 25884.

It is an arithmetic number, because the mean of its divisors is an integer number (6567750).

Almost surely, 2^155727090 is an apocalyptic number.

155727090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155727090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210168000).

155727090 is an abundant number, since it is smaller than the sum of its proper divisors (264608910).

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

155727090 is a wasteful number, since it uses less digits than its factorization.

155727090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048 (or 7042 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 155727090 is about 12479.0660708244. The cubic root of 155727090 is about 538.0071607602.

The spelling of 155727090 in words is "one hundred fifty-five million, seven hundred twenty-seven thousand, ninety".