155084420 has 24 divisors (see below), whose sum is σ = 327484248. Its totient is φ = 61689600.

The previous prime is 155084401. The next prime is 155084429. The reversal of 155084420 is 24480551.

It can be written as a sum of positive squares in 4 ways, for example, as 6390784 + 148693636 = 2528^2 + 12194^2 .

It is not an unprimeable number, because it can be changed into a prime (155084429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17801 + ... + 25040.

It is an arithmetic number, because the mean of its divisors is an integer number (13645177).

Almost surely, 2^155084420 is an apocalyptic number.

155084420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155084420 is an abundant number, since it is smaller than the sum of its proper divisors (172399828).

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

155084420 is a wasteful number, since it uses less digits than its factorization.

155084420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43031 (or 43029 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 155084420 is about 12453.2895252620. The cubic root of 155084420 is about 537.2660398761.

The spelling of 155084420 in words is "one hundred fifty-five million, eighty-four thousand, four hundred twenty".