387291055 has 8 divisors (see below), whose sum is σ = 465558192. Its totient is φ = 309293568.

The previous prime is 387291053. The next prime is 387291071. The reversal of 387291055 is 550192783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 387291055 - 2¹ = 387291053 is a prime.

It is a super-2 number, since 2×387291055² = 299988722566026050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387290999 and 387291017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387291053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64237 + ... + 70006.

It is an arithmetic number, because the mean of its divisors is an integer number (58194774).

Almost surely, 2^387291055 is an apocalyptic number.

387291055 is a deficient number, since it is larger than the sum of its proper divisors (78267137).

387291055 is a wasteful number, since it uses less digits than its factorization.

387291055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134825.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 387291055 is about 19679.7117611006. The cubic root of 387291055 is about 728.9188066553.

The spelling of 387291055 in words is "three hundred eighty-seven million, two hundred ninety-one thousand, fifty-five".