30402140 has 12 divisors (see below), whose sum is σ = 63844536. Its totient is φ = 12160848.

The previous prime is 30402139. The next prime is 30402143. The reversal of 30402140 is 4120403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30402143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760034 + ... + 760073.

It is an arithmetic number, because the mean of its divisors is an integer number (5320378).

Almost surely, 2^30402140 is an apocalyptic number.

It is an amenable number.

30402140 is an abundant number, since it is smaller than the sum of its proper divisors (33442396).

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

30402140 is a wasteful number, since it uses less digits than its factorization.

30402140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520116 (or 1520114 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 30402140 is about 5513.8135623178. The cubic root of 30402140 is about 312.1054733255.

Adding to 30402140 its reverse (4120403), we get a palindrome (34522543).

The spelling of 30402140 in words is "thirty million, four hundred two thousand, one hundred forty".