406671987 has 8 divisors (see below), whose sum is σ = 544081104. Its totient is φ = 270188768.

The previous prime is 406671983. The next prime is 406672001. The reversal of 406671987 is 789176604.

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 406671987 - 2² = 406671983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406671983) 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, 230448 + ... + 232205.

It is an arithmetic number, because the mean of its divisors is an integer number (68010138).

Almost surely, 2^406671987 is an apocalyptic number.

406671987 is a deficient number, since it is larger than the sum of its proper divisors (137409117).

406671987 is a wasteful number, since it uses less digits than its factorization.

406671987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462949.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 406671987 is about 20166.1098628367. The cubic root of 406671987 is about 740.8803662760.

The spelling of 406671987 in words is "four hundred six million, six hundred seventy-one thousand, nine hundred eighty-seven".