42404392 has 24 divisors (see below), whose sum is σ = 84464910. Its totient is φ = 19953920.

The previous prime is 42404363. The next prime is 42404419. The reversal of 42404392 is 29340424.

It can be written as a sum of positive squares in 3 ways, for example, as 38019556 + 4384836 = 6166^2 + 2094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42404392.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6859 + ... + 11482.

Almost surely, 2^42404392 is an apocalyptic number.

It is an amenable number.

42404392 is a deficient number, since it is larger than the sum of its proper divisors (42060518).

42404392 is a wasteful number, since it uses less digits than its factorization.

42404392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18381 (or 18360 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 42404392 is about 6511.8654777260. The cubic root of 42404392 is about 348.7147199487.

The spelling of 42404392 in words is "forty-two million, four hundred four thousand, three hundred ninety-two".