406740387 has 8 divisors (see below), whose sum is σ = 543400704. Its totient is φ = 270620168.

The previous prime is 406740379. The next prime is 406740403. The reversal of 406740387 is 783047604.

It is a happy number.

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 406740387 - 2³ = 406740379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406740287) 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, 133263 + ... + 136280.

It is an arithmetic number, because the mean of its divisors is an integer number (67925088).

Almost surely, 2^406740387 is an apocalyptic number.

406740387 is a deficient number, since it is larger than the sum of its proper divisors (136660317).

406740387 is a wasteful number, since it uses less digits than its factorization.

406740387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270049.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 406740387 is about 20167.8057061248. The cubic root of 406740387 is about 740.9219012869.

The spelling of 406740387 in words is "four hundred six million, seven hundred forty thousand, three hundred eighty-seven".