30780396 has 36 divisors (see below), whose sum is σ = 80318784. Its totient is φ = 9928800.

The previous prime is 30780349. The next prime is 30780413. The reversal of 30780396 is 69308703.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30780396.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12675 + ... + 14906.

Almost surely, 2^30780396 is an apocalyptic number.

30780396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30780396 is an abundant number, since it is smaller than the sum of its proper divisors (49538388).

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

30780396 is a wasteful number, since it uses less digits than its factorization.

30780396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27622 (or 27617 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30780396 is about 5548.0082912699. The cubic root of 30780396 is about 313.3945220273.

The spelling of 30780396 in words is "thirty million, seven hundred eighty thousand, three hundred ninety-six".