30440642 has 8 divisors (see below), whose sum is σ = 48346956. Its totient is φ = 14324992.

The previous prime is 30440639. The next prime is 30440681. The reversal of 30440642 is 24604403.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30019441 + 421201 = 5479^2 + 649^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447623 + ... + 447690.

Almost surely, 2^30440642 is an apocalyptic number.

30440642 is a deficient number, since it is larger than the sum of its proper divisors (17906314).

30440642 is a wasteful number, since it uses less digits than its factorization.

30440642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895332.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 30440642 is about 5517.3038705513. The cubic root of 30440642 is about 312.2371703678.

The spelling of 30440642 in words is "thirty million, four hundred forty thousand, six hundred forty-two".