155000620 has 72 divisors (see below), whose sum is σ = 346308480. Its totient is φ = 58206720.

The previous prime is 155000609. The next prime is 155000627. The reversal of 155000620 is 26000551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155000627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1741536 + ... + 1741624.

It is an arithmetic number, because the mean of its divisors is an integer number (4809840).

Almost surely, 2^155000620 is an apocalyptic number.

155000620 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 155000620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173154240).

155000620 is an abundant number, since it is smaller than the sum of its proper divisors (191307860).

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

155000620 is a wasteful number, since it uses less digits than its factorization.

155000620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155000620 is about 12449.9244977630. The cubic root of 155000620 is about 537.1692517182.

The spelling of 155000620 in words is "one hundred fifty-five million, six hundred twenty", and thus it is an aban number.