90249478 has 8 divisors (see below), whose sum is σ = 147681000. Its totient is φ = 41022480.

The previous prime is 90249457. The next prime is 90249491. The reversal of 90249478 is 87494209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051103 + ... + 2051146.

It is an arithmetic number, because the mean of its divisors is an integer number (18460125).

Almost surely, 2^90249478 is an apocalyptic number.

90249478 is a deficient number, since it is larger than the sum of its proper divisors (57431522).

90249478 is a wasteful number, since it uses less digits than its factorization.

90249478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102262.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 90249478 is about 9499.9725262761. The cubic root of 90249478 is about 448.5541711174.

The spelling of 90249478 in words is "ninety million, two hundred forty-nine thousand, four hundred seventy-eight".