684273885 has 32 divisors (see below), whose sum is σ = 1220261760. Its totient is φ = 325398528.

The previous prime is 684273883. The next prime is 684273899. The reversal of 684273885 is 588372486.

It is a happy number.

It is not a de Polignac number, because 684273885 - 2¹ = 684273883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684273883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65772 + ... + 75461.

It is an arithmetic number, because the mean of its divisors is an integer number (38133180).

Almost surely, 2^684273885 is an apocalyptic number.

It is an amenable number.

684273885 is a deficient number, since it is larger than the sum of its proper divisors (535987875).

684273885 is a wasteful number, since it uses less digits than its factorization.

684273885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141277.

The product of its digits is 2580480, while the sum is 51.

The square root of 684273885 is about 26158.6292645467. The cubic root of 684273885 is about 881.2043964128.

The spelling of 684273885 in words is "six hundred eighty-four million, two hundred seventy-three thousand, eight hundred eighty-five".