42729890 has 32 divisors (see below), whose sum is σ = 89351424. Its totient is φ = 14408640.

The previous prime is 42729793. The next prime is 42729899. The reversal of 42729890 is 9892724.

It is not an unprimeable number, because it can be changed into a prime (42729899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (2792232).

Almost surely, 2^42729890 is an apocalyptic number.

42729890 is an abundant number, since it is smaller than the sum of its proper divisors (46621534).

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

42729890 is a wasteful number, since it uses less digits than its factorization.

42729890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 42729890 is about 6536.8103842776. The cubic root of 42729890 is about 349.6046965543.

The spelling of 42729890 in words is "forty-two million, seven hundred twenty-nine thousand, eight hundred ninety".