396921455 has 8 divisors (see below), whose sum is σ = 544349472. Its totient is φ = 272174688.

The previous prime is 396921431. The next prime is 396921487. The reversal of 396921455 is 554129693.

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 396921455 - 2⁶ = 396921391 is a prime.

It is a Duffinian number.

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, 5670272 + ... + 5670341.

It is an arithmetic number, because the mean of its divisors is an integer number (68043684).

Almost surely, 2^396921455 is an apocalyptic number.

396921455 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

396921455 is a deficient number, since it is larger than the sum of its proper divisors (147428017).

396921455 is a wasteful number, since it uses less digits than its factorization.

396921455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340625.

The product of its digits is 291600, while the sum is 44.

The square root of 396921455 is about 19922.8877173968. The cubic root of 396921455 is about 734.9111867636.

The spelling of 396921455 in words is "three hundred ninety-six million, nine hundred twenty-one thousand, four hundred fifty-five".