90427446720 has 672 divisors, whose sum is σ = 344491056000. Its totient is φ = 21634449408.

The previous prime is 90427446631. The next prime is 90427446761. The reversal of 90427446720 is 2764472409.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 394879566 + ... + 394879794.

It is an arithmetic number, because the mean of its divisors is an integer number (512635500).

Almost surely, 2^90427446720 is an apocalyptic number.

90427446720 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90427446720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172245528000).

90427446720 is an abundant number, since it is smaller than the sum of its proper divisors (254063609280).

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

90427446720 is a wasteful number, since it uses less digits than its factorization.

90427446720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 90427446720 in words is "ninety billion, four hundred twenty-seven million, four hundred forty-six thousand, seven hundred twenty".