90423078 has 16 divisors (see below), whose sum is σ = 182637936. Its totient is φ = 29842400.

The previous prime is 90423077. The next prime is 90423083. The reversal of 90423078 is 87032409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90423077) 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, 74001 + ... + 75212.

It is an arithmetic number, because the mean of its divisors is an integer number (11414871).

Almost surely, 2^90423078 is an apocalyptic number.

90423078 is an abundant number, since it is smaller than the sum of its proper divisors (92214858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90423078 is a wasteful number, since it uses less digits than its factorization.

90423078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149319.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 90423078 is about 9509.1050052042. The cubic root of 90423078 is about 448.8415933852.

The spelling of 90423078 in words is "ninety million, four hundred twenty-three thousand, seventy-eight".