406687394 has 8 divisors (see below), whose sum is σ = 614071488. Its totient is φ = 201996900.

The previous prime is 406687367. The next prime is 406687397. The reversal of 406687394 is 493786604.

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

It is a super-2 number, since 2×406687394² = 330789272877022472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406687397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673022 + ... + 673625.

It is an arithmetic number, because the mean of its divisors is an integer number (76758936).

Almost surely, 2^406687394 is an apocalyptic number.

406687394 is a deficient number, since it is larger than the sum of its proper divisors (207384094).

406687394 is a wasteful number, since it uses less digits than its factorization.

406687394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346800.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 406687394 is about 20166.4918615013. The cubic root of 406687394 is about 740.8897223829.

The spelling of 406687394 in words is "four hundred six million, six hundred eighty-seven thousand, three hundred ninety-four".