30452640 has 48 divisors (see below), whose sum is σ = 95927328. Its totient is φ = 8120576.

The previous prime is 30452599. The next prime is 30452641. The reversal of 30452640 is 4625403.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30452640.

It is not an unprimeable number, because it can be changed into a prime (30452641) by changing a digit.

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, 31242 + ... + 32201.

It is an arithmetic number, because the mean of its divisors is an integer number (1998486).

Almost surely, 2^30452640 is an apocalyptic number.

30452640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30452640 is an abundant number, since it is smaller than the sum of its proper divisors (65474688).

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

30452640 is a wasteful number, since it uses less digits than its factorization.

30452640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63461 (or 63453 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 30452640 is about 5518.3910698681. The cubic root of 30452640 is about 312.2781871275.

The spelling of 30452640 in words is "thirty million, four hundred fifty-two thousand, six hundred forty".