42990004 has 12 divisors (see below), whose sum is σ = 77266084. Its totient is φ = 20913984.

The previous prime is 42990001. The next prime is 42990011. The reversal of 42990004 is 40009924.

It can be written as a sum of positive squares in 2 ways, for example, as 23541904 + 19448100 = 4852^2 + 4410^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42990001) 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, 145089 + ... + 145384.

Almost surely, 2^42990004 is an apocalyptic number.

It is an amenable number.

42990004 is a deficient number, since it is larger than the sum of its proper divisors (34276080).

42990004 is a wasteful number, since it uses less digits than its factorization.

42990004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290514 (or 290512 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 42990004 is about 6556.6762921468. The cubic root of 42990004 is about 350.3126566736.

Adding to 42990004 its reverse (40009924), we get a palindrome (82999928).

The spelling of 42990004 in words is "forty-two million, nine hundred ninety thousand, four".