30894840 has 48 divisors (see below), whose sum is σ = 100409400. Its totient is φ = 8238528.

The previous prime is 30894821. The next prime is 30894883. The reversal of 30894840 is 4849803.

It is a super-2 number, since 2×30894840² = 1908982277251200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30894795 and 30894804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42550 + ... + 43269.

Almost surely, 2^30894840 is an apocalyptic number.

30894840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30894840 is an abundant number, since it is smaller than the sum of its proper divisors (69514560).

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

30894840 is a wasteful number, since it uses less digits than its factorization.

30894840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85836 (or 85829 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 30894840 is about 5558.3126936149. The cubic root of 30894840 is about 313.7824503613.

The spelling of 30894840 in words is "thirty million, eight hundred ninety-four thousand, eight hundred forty".