90230820 has 24 divisors (see below), whose sum is σ = 252646464. Its totient is φ = 24061536.

The previous prime is 90230797. The next prime is 90230821. The reversal of 90230820 is 2803209.

It is not an unprimeable number, because it can be changed into a prime (90230821) 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, 751864 + ... + 751983.

It is an arithmetic number, because the mean of its divisors is an integer number (10526936).

Almost surely, 2^90230820 is an apocalyptic number.

It is an amenable number.

90230820 is an abundant number, since it is smaller than the sum of its proper divisors (162415644).

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

90230820 is a wasteful number, since it uses less digits than its factorization.

90230820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503859 (or 1503857 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90230820 is about 9498.9904726766. The cubic root of 90230820 is about 448.5232579173.

The spelling of 90230820 in words is "ninety million, two hundred thirty thousand, eight hundred twenty".