30745740 has 24 divisors (see below), whose sum is σ = 86088240. Its totient is φ = 8198848.

The previous prime is 30745691. The next prime is 30745751. The reversal of 30745740 is 4754703.

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 = 30745698 and 30745707.

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 7 ways as a sum of consecutive naturals, for example, 256155 + ... + 256274.

It is an arithmetic number, because the mean of its divisors is an integer number (3587010).

Almost surely, 2^30745740 is an apocalyptic number.

30745740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30745740 is an abundant number, since it is smaller than the sum of its proper divisors (55342500).

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

30745740 is a wasteful number, since it uses less digits than its factorization.

30745740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512441 (or 512439 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 30745740 is about 5544.8841286361. The cubic root of 30745740 is about 313.2768596978.

The spelling of 30745740 in words is "thirty million, seven hundred forty-five thousand, seven hundred forty".