155127720 has 256 divisors, whose sum is σ = 557383680. Its totient is φ = 34099200.

The previous prime is 155127719. The next prime is 155127773. The reversal of 155127720 is 27721551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 695529 + ... + 695751.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^155127720 is an apocalyptic number.

155127720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155127720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278691840).

155127720 is an abundant number, since it is smaller than the sum of its proper divisors (402255960).

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

155127720 is a wasteful number, since it uses less digits than its factorization.

155127720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 155127720 is about 12455.0279004103. The cubic root of 155127720 is about 537.3160372792.

It can be divided in two parts, 15512 and 7720, that added together give a palindrome (23232).

The spelling of 155127720 in words is "one hundred fifty-five million, one hundred twenty-seven thousand, seven hundred twenty".