90028646 has 4 divisors (see below), whose sum is σ = 135042972. Its totient is φ = 45014322.

The previous prime is 90028643. The next prime is 90028657. The reversal of 90028646 is 64682009.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90028643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22507160 + ... + 22507163.

It is an arithmetic number, because the mean of its divisors is an integer number (33760743).

Almost surely, 2^90028646 is an apocalyptic number.

90028646 is a deficient number, since it is larger than the sum of its proper divisors (45014326).

90028646 is a wasteful number, since it uses less digits than its factorization.

90028646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45014325.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 90028646 is about 9488.3426371522. The cubic root of 90028646 is about 448.1880156567.

The spelling of 90028646 in words is "ninety million, twenty-eight thousand, six hundred forty-six".