30606240 has 96 divisors (see below), whose sum is σ = 110194560. Its totient is φ = 6994944.

The previous prime is 30606229. The next prime is 30606263. The reversal of 30606240 is 4260603.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (1147860).

Almost surely, 2^30606240 is an apocalyptic number.

30606240 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 30606240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55097280).

30606240 is an abundant number, since it is smaller than the sum of its proper divisors (79588320).

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

30606240 is a wasteful number, since it uses less digits than its factorization.

30606240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134 (or 9126 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 30606240 is about 5532.2906648151. The cubic root of 30606240 is about 312.8023399288.

Adding to 30606240 its reverse (4260603), we get a palindrome (34866843).

The spelling of 30606240 in words is "thirty million, six hundred six thousand, two hundred forty".