155486020 has 12 divisors (see below), whose sum is σ = 326520684. Its totient is φ = 62194400.

The previous prime is 155485969. The next prime is 155486021. The reversal of 155486020 is 20684551.

It can be written as a sum of positive squares in 2 ways, for example, as 62980096 + 92505924 = 7936^2 + 9618^2 .

It is not an unprimeable number, because it can be changed into a prime (155486021) 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, 3887131 + ... + 3887170.

It is an arithmetic number, because the mean of its divisors is an integer number (27210057).

Almost surely, 2^155486020 is an apocalyptic number.

155486020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155486020 is an abundant number, since it is smaller than the sum of its proper divisors (171034664).

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

155486020 is a wasteful number, since it uses less digits than its factorization.

155486020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7774310 (or 7774308 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 155486020 is about 12469.4033538097. The cubic root of 155486020 is about 537.7294005475.

The spelling of 155486020 in words is "one hundred fifty-five million, four hundred eighty-six thousand, twenty".