30256642 has 8 divisors (see below), whose sum is σ = 48876156. Its totient is φ = 13964592.

The previous prime is 30256637. The next prime is 30256643. The reversal of 30256642 is 24665203.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27973521 + 2283121 = 5289^2 + 1511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30256642.

It is not an unprimeable number, because it can be changed into a prime (30256643) 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, 581833 + ... + 581884.

Almost surely, 2^30256642 is an apocalyptic number.

30256642 is a deficient number, since it is larger than the sum of its proper divisors (18619514).

30256642 is a wasteful number, since it uses less digits than its factorization.

30256642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163732.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 30256642 is about 5500.6037850403. The cubic root of 30256642 is about 311.6067874072.

The spelling of 30256642 in words is "thirty million, two hundred fifty-six thousand, six hundred forty-two".