42287890 has 8 divisors (see below), whose sum is σ = 76118220. Its totient is φ = 16915152.

The previous prime is 42287881. The next prime is 42287897. The reversal of 42287890 is 9878224.

It can be written as a sum of positive squares in 2 ways, for example, as 41383489 + 904401 = 6433^2 + 951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42287897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2114385 + ... + 2114404.

Almost surely, 2^42287890 is an apocalyptic number.

42287890 is a deficient number, since it is larger than the sum of its proper divisors (33830330).

42287890 is a wasteful number, since it uses less digits than its factorization.

42287890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228796.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 42287890 is about 6502.9139622172. The cubic root of 42287890 is about 348.3950736213.

The spelling of 42287890 in words is "forty-two million, two hundred eighty-seven thousand, eight hundred ninety".