30542620 has 48 divisors (see below), whose sum is σ = 67995648. Its totient is φ = 11499840.

The previous prime is 30542579. The next prime is 30542641. The reversal of 30542620 is 2624503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30542591 and 30542600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30325 + ... + 31315.

It is an arithmetic number, because the mean of its divisors is an integer number (1416576).

Almost surely, 2^30542620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30542620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33997824).

30542620 is an abundant number, since it is smaller than the sum of its proper divisors (37453028).

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

30542620 is a wasteful number, since it uses less digits than its factorization.

30542620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30542620 is about 5526.5377950395. The cubic root of 30542620 is about 312.5854528975.

The spelling of 30542620 in words is "thirty million, five hundred forty-two thousand, six hundred twenty".