155801028 has 24 divisors (see below), whose sum is σ = 363873888. Its totient is φ = 51885376.

The previous prime is 155801027. The next prime is 155801029. The reversal of 155801028 is 820108551.

It is an interprime number because it is at equal distance from previous prime (155801027) and next prime (155801029).

It is a junction number, because it is equal to n+sod(n) for n = 155800986 and 155801004.

It is not an unprimeable number, because it can be changed into a prime (155801027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8875 + ... + 19757.

It is an arithmetic number, because the mean of its divisors is an integer number (15161412).

Almost surely, 2^155801028 is an apocalyptic number.

It is an amenable number.

155801028 is an abundant number, since it is smaller than the sum of its proper divisors (208072860).

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

155801028 is a wasteful number, since it uses less digits than its factorization.

155801028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12083 (or 12081 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 155801028 is about 12482.0282005770. The cubic root of 155801028 is about 538.0922944804.

Adding to 155801028 its reverse (820108551), we get a palindrome (975909579).

The spelling of 155801028 in words is "one hundred fifty-five million, eight hundred one thousand, twenty-eight".