155198620 has 24 divisors (see below), whose sum is σ = 329148288. Its totient is φ = 61464000.

The previous prime is 155198597. The next prime is 155198623. The reversal of 155198620 is 26891551.

It is a super-2 number, since 2×155198620² = 48173223299808800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155198620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155198623) 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, 36396 + ... + 40435.

It is an arithmetic number, because the mean of its divisors is an integer number (13714512).

Almost surely, 2^155198620 is an apocalyptic number.

155198620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155198620 is an abundant number, since it is smaller than the sum of its proper divisors (173949668).

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

155198620 is a wasteful number, since it uses less digits than its factorization.

155198620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76941 (or 76939 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 155198620 is about 12457.8738153828. The cubic root of 155198620 is about 537.3978836114.

The spelling of 155198620 in words is "one hundred fifty-five million, one hundred ninety-eight thousand, six hundred twenty".