155956240 has 40 divisors (see below), whose sum is σ = 395563968. Its totient is φ = 56711040.

The previous prime is 155956231. The next prime is 155956243. The reversal of 155956240 is 42659551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 155956240.

It is not an unprimeable number, because it can be changed into a prime (155956243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87732 + ... + 89491.

Almost surely, 2^155956240 is an apocalyptic number.

155956240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155956240 is an abundant number, since it is smaller than the sum of its proper divisors (239607728).

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

155956240 is a wasteful number, since it uses less digits than its factorization.

155956240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177247 (or 177241 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 155956240 is about 12488.2440719262. The cubic root of 155956240 is about 538.2709211630.

The spelling of 155956240 in words is "one hundred fifty-five million, nine hundred fifty-six thousand, two hundred forty".