30900000 has 144 divisors (see below), whose sum is σ = 102368448. Its totient is φ = 8160000.

The previous prime is 30899969. The next prime is 30900013. The reversal of 30900000 is 903.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299949 + ... + 300051.

It is an arithmetic number, because the mean of its divisors is an integer number (710892).

Almost surely, 2^30900000 is an apocalyptic number.

30900000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51184224).

30900000 is an abundant number, since it is smaller than the sum of its proper divisors (71468448).

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

30900000 is an equidigital number, since it uses as much as digits as its factorization.

30900000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 30900000 is about 5558.7768438749. The cubic root of 30900000 is about 313.7999185136.

Adding to 30900000 its reverse (903), we get a palindrome (30900903).

It can be divided in two parts, 30 and 900000, that multiplied together give a cube (27000000 = 300³).

The spelling of 30900000 in words is "thirty million, nine hundred thousand".