30356940 has 24 divisors (see below), whose sum is σ = 84999600. Its totient is φ = 8095168.

The previous prime is 30356929. The next prime is 30356947. The reversal of 30356940 is 4965303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30356898 and 30356907.

It is not an unprimeable number, because it can be changed into a prime (30356947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252915 + ... + 253034.

It is an arithmetic number, because the mean of its divisors is an integer number (3541650).

Almost surely, 2^30356940 is an apocalyptic number.

30356940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30356940 is an abundant number, since it is smaller than the sum of its proper divisors (54642660).

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

30356940 is a wasteful number, since it uses less digits than its factorization.

30356940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505961 (or 505959 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 30356940 is about 5509.7132411769. The cubic root of 30356940 is about 311.9507236445.

The spelling of 30356940 in words is "thirty million, three hundred fifty-six thousand, nine hundred forty".