90389426 has 4 divisors (see below), whose sum is σ = 135584142. Its totient is φ = 45194712.

The previous prime is 90389423. The next prime is 90389443. The reversal of 90389426 is 62498309.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62498309 = 41 ⋅1524349.

It can be written as a sum of positive squares in only one way, i.e., 86583025 + 3806401 = 9305^2 + 1951^2 .

It is not an unprimeable number, because it can be changed into a prime (90389423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22597355 + ... + 22597358.

Almost surely, 2^90389426 is an apocalyptic number.

90389426 is a deficient number, since it is larger than the sum of its proper divisors (45194716).

90389426 is a wasteful number, since it uses less digits than its factorization.

90389426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45194715.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 90389426 is about 9507.3353785380. The cubic root of 90389426 is about 448.7859059369.

The spelling of 90389426 in words is "ninety million, three hundred eighty-nine thousand, four hundred twenty-six".