90434205 has 32 divisors (see below), whose sum is σ = 169238400. Its totient is φ = 45691776.

The previous prime is 90434189. The next prime is 90434213. The reversal of 90434205 is 50243409.

It is not a de Polignac number, because 90434205 - 2⁴ = 90434189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15064 + ... + 20193.

It is an arithmetic number, because the mean of its divisors is an integer number (5288700).

Almost surely, 2^90434205 is an apocalyptic number.

90434205 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90434205 is a deficient number, since it is larger than the sum of its proper divisors (78804195).

90434205 is a wasteful number, since it uses less digits than its factorization.

90434205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35290 (or 35284 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 90434205 is about 9509.6900580408. The cubic root of 90434205 is about 448.8600033446.

The spelling of 90434205 in words is "ninety million, four hundred thirty-four thousand, two hundred five".