155246720 has 128 divisors (see below), whose sum is σ = 414201600. Its totient is φ = 55296000.

The previous prime is 155246719. The next prime is 155246723. The reversal of 155246720 is 27642551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (155246723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206345 + ... + 207095.

It is an arithmetic number, because the mean of its divisors is an integer number (3235950).

Almost surely, 2^155246720 is an apocalyptic number.

155246720 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 155246720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207100800).

155246720 is an abundant number, since it is smaller than the sum of its proper divisors (258954880).

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

155246720 is a wasteful number, since it uses less digits than its factorization.

155246720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 155246720 is about 12459.8041718159. The cubic root of 155246720 is about 537.4533956347.

The spelling of 155246720 in words is "one hundred fifty-five million, two hundred forty-six thousand, seven hundred twenty".