155732340 has 48 divisors (see below), whose sum is σ = 438963840. Its totient is φ = 41251200.

The previous prime is 155732299. The next prime is 155732363. The reversal of 155732340 is 43237551.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155732298 and 155732307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466 + ... + 17654.

It is an arithmetic number, because the mean of its divisors is an integer number (9145080).

Almost surely, 2^155732340 is an apocalyptic number.

155732340 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 155732340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219481920).

155732340 is an abundant number, since it is smaller than the sum of its proper divisors (283231500).

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

155732340 is a wasteful number, since it uses less digits than its factorization.

155732340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17352 (or 17350 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 155732340 is about 12479.2764213315. The cubic root of 155732340 is about 538.0132066059.

Adding to 155732340 its reverse (43237551), we get a palindrome (198969891).

The spelling of 155732340 in words is "one hundred fifty-five million, seven hundred thirty-two thousand, three hundred forty".