30778013 has 8 divisors (see below), whose sum is σ = 35221632. Its totient is φ = 26346096.

The previous prime is 30777941. The next prime is 30778021. The reversal of 30778013 is 31087703.

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

It is not a de Polignac number, because 30778013 - 2¹⁸ = 30515869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30778093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3731 + ... + 8687.

It is an arithmetic number, because the mean of its divisors is an integer number (4402704).

Almost surely, 2^30778013 is an apocalyptic number.

It is an amenable number.

30778013 is a deficient number, since it is larger than the sum of its proper divisors (4443619).

30778013 is an equidigital number, since it uses as much as digits as its factorization.

30778013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 30778013 is about 5547.7935253576. The cubic root of 30778013 is about 313.3864342126.

The spelling of 30778013 in words is "thirty million, seven hundred seventy-eight thousand, thirteen".