395680987 has 8 divisors (see below), whose sum is σ = 434158704. Its totient is φ = 358351968.

The previous prime is 395680919. The next prime is 395681047. The reversal of 395680987 is 789086593.

It is a happy number.

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

It is not a de Polignac number, because 395680987 - 2¹¹ = 395678939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395680487) 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, 286453 + ... + 287830.

It is an arithmetic number, because the mean of its divisors is an integer number (54269838).

Almost surely, 2^395680987 is an apocalyptic number.

395680987 is a deficient number, since it is larger than the sum of its proper divisors (38477717).

395680987 is a wasteful number, since it uses less digits than its factorization.

395680987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574349.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 395680987 is about 19891.7316239688. The cubic root of 395680987 is about 734.1448007552.

The spelling of 395680987 in words is "three hundred ninety-five million, six hundred eighty thousand, nine hundred eighty-seven".