30402940 has 24 divisors (see below), whose sum is σ = 65907072. Its totient is φ = 11768640.

The previous prime is 30402929. The next prime is 30402947. The reversal of 30402940 is 4920403.

30402940 = T₁₃₈₅ + T₁₃₈₆ + ... + T₁₄₁₅.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30402947) by changing a digit.

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, 23899 + ... + 25138.

It is an arithmetic number, because the mean of its divisors is an integer number (2746128).

Almost surely, 2^30402940 is an apocalyptic number.

It is an amenable number.

30402940 is an abundant number, since it is smaller than the sum of its proper divisors (35504132).

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

30402940 is a wasteful number, since it uses less digits than its factorization.

30402940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49077 (or 49075 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 30402940 is about 5513.8861069123. The cubic root of 30402940 is about 312.1082108760.

The spelling of 30402940 in words is "thirty million, four hundred two thousand, nine hundred forty".