90744478 has 16 divisors (see below), whose sum is σ = 151009920. Its totient is φ = 40547800.

The previous prime is 90744473. The next prime is 90744523. The reversal of 90744478 is 87444709.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90744473) 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, 33658 + ... + 36253.

It is an arithmetic number, because the mean of its divisors is an integer number (9438120).

Almost surely, 2^90744478 is an apocalyptic number.

90744478 is a deficient number, since it is larger than the sum of its proper divisors (60265442).

90744478 is a wasteful number, since it uses less digits than its factorization.

90744478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69983.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 90744478 is about 9525.9896073846. The cubic root of 90744478 is about 449.3727524337.

The spelling of 90744478 in words is "ninety million, seven hundred forty-four thousand, four hundred seventy-eight".