155027820 has 48 divisors (see below), whose sum is σ = 452954880. Its totient is φ = 39542976.

The previous prime is 155027801. The next prime is 155027839. The reversal of 155027820 is 28720551.

155027820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155027801) and next prime (155027839).

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 15 ways as a sum of consecutive naturals, for example, 54790 + ... + 57549.

It is an arithmetic number, because the mean of its divisors is an integer number (9436560).

Almost surely, 2^155027820 is an apocalyptic number.

155027820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155027820 is an abundant number, since it is smaller than the sum of its proper divisors (297927060).

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

155027820 is a wasteful number, since it uses less digits than its factorization.

155027820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112374 (or 112372 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 155027820 is about 12451.0168259464. The cubic root of 155027820 is about 537.2006712680.

The spelling of 155027820 in words is "one hundred fifty-five million, twenty-seven thousand, eight hundred twenty".