30707040 has 384 divisors, whose sum is σ = 128701440. Its totient is φ = 5971968.

The previous prime is 30707011. The next prime is 30707051. The reversal of 30707040 is 4070703.

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

It is a junction number, because it is equal to n+sod(n) for n = 30706998 and 30707016.

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 63 ways as a sum of consecutive naturals, for example, 829902 + ... + 829938.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^30707040 is an apocalyptic number.

30707040 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 30707040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64350720).

30707040 is an abundant number, since it is smaller than the sum of its proper divisors (97994400).

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

30707040 is a wasteful number, since it uses less digits than its factorization.

30707040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 30707040 is about 5541.3933265921. The cubic root of 30707040 is about 313.1453628377.

Adding to 30707040 its reverse (4070703), we get a palindrome (34777743).

The spelling of 30707040 in words is "thirty million, seven hundred seven thousand, forty".