172284387440 has 40 divisors (see below), whose sum is σ = 436975857648. Its totient is φ = 62648867840.

The previous prime is 172284387421. The next prime is 172284387467. The reversal of 172284387440 is 44783482271.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97887977 + ... + 97889736.

Almost surely, 2^172284387440 is an apocalyptic number.

172284387440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172284387440 is an abundant number, since it is smaller than the sum of its proper divisors (264691470208).

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

172284387440 is a wasteful number, since it uses less digits than its factorization.

172284387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195777737 (or 195777731 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 50.

The spelling of 172284387440 in words is "one hundred seventy-two billion, two hundred eighty-four million, three hundred eighty-seven thousand, four hundred forty".