90138435 has 16 divisors (see below), whose sum is σ = 144362400. Its totient is φ = 48026880.

The previous prime is 90138431. The next prime is 90138457. The reversal of 90138435 is 53483109.

It is not a de Polignac number, because 90138435 - 2² = 90138431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90138396 and 90138405.

It is not an unprimeable number, because it can be changed into a prime (90138431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17541 + ... + 22089.

It is an arithmetic number, because the mean of its divisors is an integer number (9022650).

Almost surely, 2^90138435 is an apocalyptic number.

90138435 is a deficient number, since it is larger than the sum of its proper divisors (54223965).

90138435 is a wasteful number, since it uses less digits than its factorization.

90138435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 90138435 is about 9494.1263421128. The cubic root of 90138435 is about 448.3701285273.

The spelling of 90138435 in words is "ninety million, one hundred thirty-eight thousand, four hundred thirty-five".