30753640 has 16 divisors (see below), whose sum is σ = 69195780. Its totient is φ = 12301440.

The previous prime is 30753617. The next prime is 30753677. The reversal of 30753640 is 4635703.

It can be written as a sum of positive squares in 2 ways, for example, as 30272004 + 481636 = 5502^2 + 694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30753599 and 30753608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384381 + ... + 384460.

Almost surely, 2^30753640 is an apocalyptic number.

It is an amenable number.

30753640 is an abundant number, since it is smaller than the sum of its proper divisors (38442140).

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

30753640 is a wasteful number, since it uses less digits than its factorization.

30753640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768852 (or 768848 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 30753640 is about 5545.5964512395. The cubic root of 30753640 is about 313.3036891627.

The spelling of 30753640 in words is "thirty million, seven hundred fifty-three thousand, six hundred forty".