42729682 has 4 divisors (see below), whose sum is σ = 64094526. Its totient is φ = 21364840.

The previous prime is 42729641. The next prime is 42729683. The reversal of 42729682 is 28692724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41847961 + 881721 = 6469^2 + 939^2 .

It is a super-2 number, since 2×42729682² = 3651651447642248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42729683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10682419 + ... + 10682422.

Almost surely, 2^42729682 is an apocalyptic number.

42729682 is a deficient number, since it is larger than the sum of its proper divisors (21364844).

42729682 is a wasteful number, since it uses less digits than its factorization.

42729682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21364843.

The product of its digits is 96768, while the sum is 40.

The square root of 42729682 is about 6536.7944743582. The cubic root of 42729682 is about 349.6041292864.

The spelling of 42729682 in words is "forty-two million, seven hundred twenty-nine thousand, six hundred eighty-two".