405245685 has 64 divisors (see below), whose sum is σ = 719808768. Its totient is φ = 193449984.

The previous prime is 405245653. The next prime is 405245693. The reversal of 405245685 is 586542504.

It is not a de Polignac number, because 405245685 - 2⁵ = 405245653 is a prime.

It is a super-2 number, since 2×405245685² = 328448130422238450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1167682 + ... + 1168028.

It is an arithmetic number, because the mean of its divisors is an integer number (11247012).

Almost surely, 2^405245685 is an apocalyptic number.

It is an amenable number.

405245685 is a deficient number, since it is larger than the sum of its proper divisors (314563083).

405245685 is a wasteful number, since it uses less digits than its factorization.

405245685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 192000, while the sum is 39.

The square root of 405245685 is about 20130.7149649485. The cubic root of 405245685 is about 740.0131997889.

The spelling of 405245685 in words is "four hundred five million, two hundred forty-five thousand, six hundred eighty-five".