90409434 has 16 divisors (see below), whose sum is σ = 191455488. Its totient is φ = 28363712.

The previous prime is 90409433. The next prime is 90409439. The reversal of 90409434 is 43490409.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90409395 and 90409404.

It is not an unprimeable number, because it can be changed into a prime (90409433) 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, 443082 + ... + 443285.

It is an arithmetic number, because the mean of its divisors is an integer number (11965968).

Almost surely, 2^90409434 is an apocalyptic number.

90409434 is an abundant number, since it is smaller than the sum of its proper divisors (101046054).

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

90409434 is a wasteful number, since it uses less digits than its factorization.

90409434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886389.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 90409434 is about 9508.3875604647. The cubic root of 90409434 is about 448.8190169115.

The spelling of 90409434 in words is "ninety million, four hundred nine thousand, four hundred thirty-four".