90487042 has 4 divisors (see below), whose sum is σ = 135730566. Its totient is φ = 45243520.

The previous prime is 90487031. The next prime is 90487043. The reversal of 90487042 is 24078409.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 6599761 = 9159^2 + 2569^2 .

It is a super-4 number, since 4×90487042⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90486989 and 90487007.

It is not an unprimeable number, because it can be changed into a prime (90487043) 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 as a sum of consecutive naturals, namely, 22621759 + ... + 22621762.

Almost surely, 2^90487042 is an apocalyptic number.

90487042 is a deficient number, since it is larger than the sum of its proper divisors (45243524).

90487042 is a wasteful number, since it uses less digits than its factorization.

90487042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45243523.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 90487042 is about 9512.4677134800. The cubic root of 90487042 is about 448.9474031606.

The spelling of 90487042 in words is "ninety million, four hundred eighty-seven thousand, forty-two".