30609090 has 160 divisors (see below), whose sum is σ = 90326016. Its totient is φ = 7413120.

The previous prime is 30609071. The next prime is 30609107. The reversal of 30609090 is 9090603.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

30609090 is a modest number, since divided by 9090 gives 3060 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 577504 + ... + 577556.

Almost surely, 2^30609090 is an apocalyptic number.

30609090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30609090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45163008).

30609090 is an abundant number, since it is smaller than the sum of its proper divisors (59716926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30609090 is a wasteful number, since it uses less digits than its factorization.

30609090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 30609090 is about 5532.5482374761. The cubic root of 30609090 is about 312.8120488313.

Adding to 30609090 its reverse (9090603), we get a palindrome (39699693).

The spelling of 30609090 in words is "thirty million, six hundred nine thousand, ninety".