42729470 has 96 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 13547520.

The previous prime is 42729437. The next prime is 42729473. The reversal of 42729470 is 7492724.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 42729470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42729473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440462 + ... + 440558.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^42729470 is an apocalyptic number.

42729470 is an abundant number, since it is smaller than the sum of its proper divisors (53796610).

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

42729470 is a wasteful number, since it uses less digits than its factorization.

42729470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 42729470 is about 6536.7782584389. The cubic root of 42729470 is about 349.6035511075.

The spelling of 42729470 in words is "forty-two million, seven hundred twenty-nine thousand, four hundred seventy".