30450840 has 64 divisors (see below), whose sum is σ = 104405760. Its totient is φ = 6960000.

The previous prime is 30450803. The next prime is 30450857. The reversal of 30450840 is 4805403.

It is a happy number.

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 30450840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17286 + ... + 18965.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^30450840 is an apocalyptic number.

30450840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30450840 is an abundant number, since it is smaller than the sum of its proper divisors (73954920).

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

30450840 is a wasteful number, since it uses less digits than its factorization.

30450840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36272 (or 36268 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 30450840 is about 5518.2279764432. The cubic root of 30450840 is about 312.2720342750.

The spelling of 30450840 in words is "thirty million, four hundred fifty thousand, eight hundred forty".