30402040 has 32 divisors (see below), whose sum is σ = 68724000. Its totient is φ = 12104064.

The previous prime is 30402023. The next prime is 30402077. The reversal of 30402040 is 4020403.

It is a self number, because there is not a number n which added to its sum of digits gives 30402040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7501 + ... + 10819.

It is an arithmetic number, because the mean of its divisors is an integer number (2147625).

Almost surely, 2^30402040 is an apocalyptic number.

It is an amenable number.

30402040 is an abundant number, since it is smaller than the sum of its proper divisors (38321960).

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

30402040 is a wasteful number, since it uses less digits than its factorization.

30402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 30402040 is about 5513.8044941764. The cubic root of 30402040 is about 312.1051311283.

Adding to 30402040 its reverse (4020403), we get a palindrome (34422443).

The spelling of 30402040 in words is "thirty million, four hundred two thousand, forty".