42684786 has 16 divisors (see below), whose sum is σ = 94855200. Its totient is φ = 14228244.

The previous prime is 42684751. The next prime is 42684797. The reversal of 42684786 is 68748624.

It is a super-3 number, since 3×42684786³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

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, 395176 + ... + 395283.

It is an arithmetic number, because the mean of its divisors is an integer number (5928450).

Almost surely, 2^42684786 is an apocalyptic number.

42684786 is an abundant number, since it is smaller than the sum of its proper divisors (52170414).

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

42684786 is a wasteful number, since it uses less digits than its factorization.

42684786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790470 (or 790464 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 42684786 is about 6533.3594727368. The cubic root of 42684786 is about 349.4816435679.

The spelling of 42684786 in words is "forty-two million, six hundred eighty-four thousand, seven hundred eighty-six".