90748642 has 16 divisors (see below), whose sum is σ = 140199480. Its totient is φ = 44022528.

The previous prime is 90748633. The next prime is 90748649. The reversal of 90748642 is 24684709.

It can be written as a sum of positive squares in 4 ways, for example, as 88153321 + 2595321 = 9389^2 + 1611^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90748595 and 90748604.

It is not an unprimeable number, because it can be changed into a prime (90748649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27834 + ... + 30922.

Almost surely, 2^90748642 is an apocalyptic number.

90748642 is a deficient number, since it is larger than the sum of its proper divisors (49450838).

90748642 is a wasteful number, since it uses less digits than its factorization.

90748642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 90748642 is about 9526.2081648471. The cubic root of 90748642 is about 449.3796257978.

The spelling of 90748642 in words is "ninety million, seven hundred forty-eight thousand, six hundred forty-two".