396685787 has 8 divisors (see below), whose sum is σ = 398679840. Its totient is φ = 394696960.

The previous prime is 396685763. The next prime is 396685789. The reversal of 396685787 is 787586693.

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 396685787 - 2¹⁰ = 396684763 is a prime.

It is a super-2 number, since 2×396685787² = 314719227215618738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396685789) 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, 288233 + ... + 289605.

It is an arithmetic number, because the mean of its divisors is an integer number (49834980).

Almost surely, 2^396685787 is an apocalyptic number.

396685787 is a deficient number, since it is larger than the sum of its proper divisors (1994053).

396685787 is a wasteful number, since it uses less digits than its factorization.

396685787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613.

The product of its digits is 15240960, while the sum is 59.

The square root of 396685787 is about 19916.9723351718. The cubic root of 396685787 is about 734.7657093345.

The spelling of 396685787 in words is "three hundred ninety-six million, six hundred eighty-five thousand, seven hundred eighty-seven".