397278055 has 16 divisors (see below), whose sum is σ = 488879424. Its totient is φ = 309818880.

The previous prime is 397278043. The next prime is 397278059. The reversal of 397278055 is 550872793.

It is not a de Polignac number, because 397278055 - 2⁵ = 397278023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397277996 and 397278014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397278059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28702 + ... + 40228.

It is an arithmetic number, because the mean of its divisors is an integer number (30554964).

Almost surely, 2^397278055 is an apocalyptic number.

397278055 is a deficient number, since it is larger than the sum of its proper divisors (91601369).

397278055 is a wasteful number, since it uses less digits than its factorization.

397278055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11706.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 397278055 is about 19931.8352140489. The cubic root of 397278055 is about 735.1312058486.

The spelling of 397278055 in words is "three hundred ninety-seven million, two hundred seventy-eight thousand, fifty-five".