30256140 has 24 divisors (see below), whose sum is σ = 84717360. Its totient is φ = 8068288.

The previous prime is 30256123. The next prime is 30256157. The reversal of 30256140 is 4165203.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30256123) and next prime (30256157).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252075 + ... + 252194.

It is an arithmetic number, because the mean of its divisors is an integer number (3529890).

Almost surely, 2^30256140 is an apocalyptic number.

30256140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30256140 is an abundant number, since it is smaller than the sum of its proper divisors (54461220).

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

30256140 is a wasteful number, since it uses less digits than its factorization.

30256140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504281 (or 504279 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30256140 is about 5500.5581534968. The cubic root of 30256140 is about 311.6050640668.

The spelling of 30256140 in words is "thirty million, two hundred fifty-six thousand, one hundred forty".