155720352 has 96 divisors (see below), whose sum is σ = 437875200. Its totient is φ = 48307968.

The previous prime is 155720351. The next prime is 155720381. The reversal of 155720352 is 253027551.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (155720351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106893 + ... + 108339.

It is an arithmetic number, because the mean of its divisors is an integer number (4561200).

Almost surely, 2^155720352 is an apocalyptic number.

155720352 is a gapful number since it is divisible by the number (12) 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 155720352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218937600).

155720352 is an abundant number, since it is smaller than the sum of its proper divisors (282154848).

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

155720352 is a wasteful number, since it uses less digits than its factorization.

155720352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1530 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 155720352 is about 12478.7960957778. The cubic root of 155720352 is about 537.9994011500. Note that the first 3 decimals are identical.

The spelling of 155720352 in words is "one hundred fifty-five million, seven hundred twenty thousand, three hundred fifty-two".