155067440 has 40 divisors (see below), whose sum is σ = 393309648. Its totient is φ = 56387840.

The previous prime is 155067439. The next prime is 155067457. The reversal of 155067440 is 44760551.

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

It is a junction number, because it is equal to n+sod(n) for n = 155067397 and 155067406.

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 7 ways as a sum of consecutive naturals, for example, 87227 + ... + 88986.

Almost surely, 2^155067440 is an apocalyptic number.

155067440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155067440 is an abundant number, since it is smaller than the sum of its proper divisors (238242208).

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

155067440 is a wasteful number, since it uses less digits than its factorization.

155067440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176237 (or 176231 counting only the distinct ones).

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

The square root of 155067440 is about 12452.6077590198. The cubic root of 155067440 is about 537.2464309639.

The spelling of 155067440 in words is "one hundred fifty-five million, sixty-seven thousand, four hundred forty".