90109030 has 16 divisors (see below), whose sum is σ = 176941584. Its totient is φ = 32766880.

The previous prime is 90109007. The next prime is 90109049. The reversal of 90109030 is 3090109.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 90108992 and 90109010.

It is a congruent number.

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, 409477 + ... + 409696.

It is an arithmetic number, because the mean of its divisors is an integer number (11058849).

Almost surely, 2^90109030 is an apocalyptic number.

90109030 is a deficient number, since it is larger than the sum of its proper divisors (86832554).

90109030 is a wasteful number, since it uses less digits than its factorization.

90109030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819191.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 90109030 is about 9492.5776267566. The cubic root of 90109030 is about 448.3213673910.

Adding to 90109030 its reverse (3090109), we get a palindrome (93199139).

The spelling of 90109030 in words is "ninety million, one hundred nine thousand, thirty".