90308145 has 8 divisors (see below), whose sum is σ = 144493056. Its totient is φ = 48164336.

The previous prime is 90308137. The next prime is 90308171. The reversal of 90308145 is 54180309.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90308145 - 2³ = 90308137 is a prime.

It is a super-2 number, since 2×90308145² = 16311122106682050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010257 + ... + 3010286.

It is an arithmetic number, because the mean of its divisors is an integer number (18061632).

Almost surely, 2^90308145 is an apocalyptic number.

It is an amenable number.

90308145 is a deficient number, since it is larger than the sum of its proper divisors (54184911).

90308145 is a wasteful number, since it uses less digits than its factorization.

90308145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020551.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90308145 is about 9503.0597704108. The cubic root of 90308145 is about 448.6513448189.

The spelling of 90308145 in words is "ninety million, three hundred eight thousand, one hundred forty-five".