505429785 has 24 divisors (see below), whose sum is σ = 1001232960. Its totient is φ = 231053472.

The previous prime is 505429763. The next prime is 505429787. The reversal of 505429785 is 587924505.

It is not a de Polignac number, because 505429785 - 2⁵ = 505429753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 505429785.

It is not an unprimeable number, because it can be changed into a prime (505429787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 801955 + ... + 802584.

It is an arithmetic number, because the mean of its divisors is an integer number (41718040).

Almost surely, 2^505429785 is an apocalyptic number.

It is an amenable number.

505429785 is a deficient number, since it is larger than the sum of its proper divisors (495803175).

505429785 is a wasteful number, since it uses less digits than its factorization.

505429785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604557 (or 1604554 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 505429785 is about 22481.7656112682. The cubic root of 505429785 is about 796.5632702733.

The spelling of 505429785 in words is "five hundred five million, four hundred twenty-nine thousand, seven hundred eighty-five".