396877857 has 8 divisors (see below), whose sum is σ = 552177984. Its totient is φ = 253081488.

The previous prime is 396877853. The next prime is 396877861. The reversal of 396877857 is 758778693.

It is an interprime number because it is at equal distance from previous prime (396877853) and next prime (396877861).

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

It is not a de Polignac number, because 396877857 - 2² = 396877853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396877857.

It is not an unprimeable number, because it can be changed into a prime (396877853) 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, 2875858 + ... + 2875995.

It is an arithmetic number, because the mean of its divisors is an integer number (69022248).

Almost surely, 2^396877857 is an apocalyptic number.

It is an amenable number.

396877857 is a deficient number, since it is larger than the sum of its proper divisors (155300127).

396877857 is a wasteful number, since it uses less digits than its factorization.

396877857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751879.

The product of its digits is 17781120, while the sum is 60.

The square root of 396877857 is about 19921.7935186569. The cubic root of 396877857 is about 734.8842781392.

The spelling of 396877857 in words is "three hundred ninety-six million, eight hundred seventy-seven thousand, eight hundred fifty-seven".