90214780 has 12 divisors (see below), whose sum is σ = 189451080. Its totient is φ = 36085904.

The previous prime is 90214759. The next prime is 90214783. The reversal of 90214780 is 8741209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90214783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255350 + ... + 2255389.

It is an arithmetic number, because the mean of its divisors is an integer number (15787590).

Almost surely, 2^90214780 is an apocalyptic number.

It is an amenable number.

90214780 is an abundant number, since it is smaller than the sum of its proper divisors (99236300).

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

90214780 is a wasteful number, since it uses less digits than its factorization.

90214780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510748 (or 4510746 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 90214780 is about 9498.1461349044. The cubic root of 90214780 is about 448.4966789006.

Adding to 90214780 its reverse (8741209), we get a palindrome (98955989).

The spelling of 90214780 in words is "ninety million, two hundred fourteen thousand, seven hundred eighty".