30473640 has 48 divisors (see below), whose sum is σ = 99040500. Its totient is φ = 8126208.

The previous prime is 30473621. The next prime is 30473647. The reversal of 30473640 is 4637403.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 2022084 = 5334^2 + 1422^2 .

It is not an unprimeable number, because it can be changed into a prime (30473647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41965 + ... + 42684.

Almost surely, 2^30473640 is an apocalyptic number.

30473640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30473640 is an abundant number, since it is smaller than the sum of its proper divisors (68566860).

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

30473640 is a wasteful number, since it uses less digits than its factorization.

30473640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84666 (or 84659 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 30473640 is about 5520.2934704597. The cubic root of 30473640 is about 312.3499524993.

It can be divided in two parts, 30473 and 640, that added together give a palindrome (31113).

The spelling of 30473640 in words is "thirty million, four hundred seventy-three thousand, six hundred forty".