42280394 has 32 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 17563392.

The previous prime is 42280393. The next prime is 42280409. The reversal of 42280394 is 49308224.

42280394 = 217² + 218² + ... + 515².

It is a self number, because there is not a number n which added to its sum of digits gives 42280394.

It is not an unprimeable number, because it can be changed into a prime (42280393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8087 + ... + 12245.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^42280394 is an apocalyptic number.

42280394 is a deficient number, since it is larger than the sum of its proper divisors (33198646).

42280394 is a wasteful number, since it uses less digits than its factorization.

42280394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 42280394 is about 6502.3375796709. The cubic root of 42280394 is about 348.3744867678.

The spelling of 42280394 in words is "forty-two million, two hundred eighty thousand, three hundred ninety-four".