42861090 has 16 divisors (see below), whose sum is σ = 102866688. Its totient is φ = 11429616.

The previous prime is 42861083. The next prime is 42861109. The reversal of 42861090 is 9016824.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1428703 = 42861090 / (4 + 2 + 8 + 6 + 1 + 0 + 9 + 0).

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, 714322 + ... + 714381.

It is an arithmetic number, because the mean of its divisors is an integer number (6429168).

Almost surely, 2^42861090 is an apocalyptic number.

42861090 is an abundant number, since it is smaller than the sum of its proper divisors (60005598).

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

42861090 is a wasteful number, since it uses less digits than its factorization.

42861090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428713.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 42861090 is about 6546.8381681542. The cubic root of 42861090 is about 349.9621455658.

The spelling of 42861090 in words is "forty-two million, eight hundred sixty-one thousand, ninety".