396907435987 has 16 divisors (see below), whose sum is σ = 411422533632. Its totient is φ = 382500423360.

The previous prime is 396907435957. The next prime is 396907436021. The reversal of 396907435987 is 789534709693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396907435987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396907435957) 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, 26546848 + ... + 26561794.

It is an arithmetic number, because the mean of its divisors is an integer number (25713908352).

Almost surely, 2^396907435987 is an apocalyptic number.

396907435987 is a deficient number, since it is larger than the sum of its proper divisors (14515097645).

396907435987 is a wasteful number, since it uses less digits than its factorization.

396907435987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498.

The product of its (nonzero) digits is 308629440, while the sum is 70.

The spelling of 396907435987 in words is "three hundred ninety-six billion, nine hundred seven million, four hundred thirty-five thousand, nine hundred eighty-seven".