90405306 has 24 divisors (see below), whose sum is σ = 206188320. Its totient is φ = 28548936.

The previous prime is 90405241. The next prime is 90405313. The reversal of 90405306 is 60350409.

It is a happy number.

90405306 is a `hidden beast` number, since 90 + 40 + 530 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 90405306.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131830 + ... + 132513.

It is an arithmetic number, because the mean of its divisors is an integer number (8591180).

Almost surely, 2^90405306 is an apocalyptic number.

90405306 is an abundant number, since it is smaller than the sum of its proper divisors (115783014).

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

90405306 is a wasteful number, since it uses less digits than its factorization.

90405306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264370 (or 264367 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 90405306 is about 9508.1704864816. The cubic root of 90405306 is about 448.8121859389.

The spelling of 90405306 in words is "ninety million, four hundred five thousand, three hundred six".