90028431 has 6 divisors (see below), whose sum is σ = 130041080. Its totient is φ = 60018948.

The previous prime is 90028391. The next prime is 90028451. The reversal of 90028431 is 13482009.

It is not a de Polignac number, because 90028431 - 2⁷ = 90028303 is a prime.

It is a super-2 number, since 2×90028431² = 16210236776643522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90028395 and 90028404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90028451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5001571 + ... + 5001588.

Almost surely, 2^90028431 is an apocalyptic number.

90028431 is a deficient number, since it is larger than the sum of its proper divisors (40012649).

90028431 is a wasteful number, since it uses less digits than its factorization.

90028431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10003165 (or 10003162 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 90028431 is about 9488.3313074534. The cubic root of 90028431 is about 448.1876588795.

The spelling of 90028431 in words is "ninety million, twenty-eight thousand, four hundred thirty-one".