405245686 has 8 divisors (see below), whose sum is σ = 608103144. Its totient is φ = 202544640.

The previous prime is 405245653. The next prime is 405245693. The reversal of 405245686 is 686542504.

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

It is a super-2 number, since 2×405245686² = 328448132043221192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32395 + ... + 43126.

It is an arithmetic number, because the mean of its divisors is an integer number (76012893).

Almost surely, 2^405245686 is an apocalyptic number.

405245686 is a deficient number, since it is larger than the sum of its proper divisors (202857458).

405245686 is a wasteful number, since it uses less digits than its factorization.

405245686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78206.

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 405245686 is about 20130.7149897861. The cubic root of 405245686 is about 740.0132003976.

The spelling of 405245686 in words is "four hundred five million, two hundred forty-five thousand, six hundred eighty-six".