405017994 has 16 divisors (see below), whose sum is σ = 845255232. Its totient is φ = 129136128.

The previous prime is 405017969. The next prime is 405018001. The reversal of 405017994 is 499710504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467319 + ... + 1467594.

It is an arithmetic number, because the mean of its divisors is an integer number (52828452).

Almost surely, 2^405017994 is an apocalyptic number.

405017994 is an abundant number, since it is smaller than the sum of its proper divisors (440237238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405017994 is a wasteful number, since it uses less digits than its factorization.

405017994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934941.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 405017994 is about 20125.0588570568. The cubic root of 405017994 is about 739.8745794258.

The spelling of 405017994 in words is "four hundred five million, seventeen thousand, nine hundred ninety-four".