155355420 has 96 divisors (see below), whose sum is σ = 476534016. Its totient is φ = 37504000.

The previous prime is 155355383. The next prime is 155355439. The reversal of 155355420 is 24553551.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264367 + ... + 264953.

It is an arithmetic number, because the mean of its divisors is an integer number (4963896).

Almost surely, 2^155355420 is an apocalyptic number.

155355420 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 155355420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238267008).

155355420 is an abundant number, since it is smaller than the sum of its proper divisors (321178596).

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

155355420 is a wasteful number, since it uses less digits than its factorization.

155355420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155355420 is about 12464.1654353591. The cubic root of 155355420 is about 537.5788036613.

The spelling of 155355420 in words is "one hundred fifty-five million, three hundred fifty-five thousand, four hundred twenty".