90420744 has 64 divisors (see below), whose sum is σ = 237061440. Its totient is φ = 28707840.

The previous prime is 90420697. The next prime is 90420749. The reversal of 90420744 is 44702409.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90420749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41244 + ... + 43380.

It is an arithmetic number, because the mean of its divisors is an integer number (3704085).

Almost surely, 2^90420744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90420744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118530720).

90420744 is an abundant number, since it is smaller than the sum of its proper divisors (146640696).

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

90420744 is a wasteful number, since it uses less digits than its factorization.

90420744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2226 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 90420744 is about 9508.9822799288. The cubic root of 90420744 is about 448.8377315197.

The spelling of 90420744 in words is "ninety million, four hundred twenty thousand, seven hundred forty-four".