155382020 has 48 divisors (see below), whose sum is σ = 342897408. Its totient is φ = 59030400.

The previous prime is 155382001. The next prime is 155382049. The reversal of 155382020 is 20283551.

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, 68342 + ... + 70578.

It is an arithmetic number, because the mean of its divisors is an integer number (7143696).

Almost surely, 2^155382020 is an apocalyptic number.

155382020 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 155382020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171448704).

155382020 is an abundant number, since it is smaller than the sum of its proper divisors (187515388).

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

155382020 is a wasteful number, since it uses less digits than its factorization.

155382020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 155382020 is about 12465.2324486951. The cubic root of 155382020 is about 537.6094833766.

The spelling of 155382020 in words is "one hundred fifty-five million, three hundred eighty-two thousand, twenty".