30778480 has 40 divisors (see below), whose sum is σ = 75330000. Its totient is φ = 11662848.

The previous prime is 30778463. The next prime is 30778511. The reversal of 30778480 is 8487703.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30778480² = 1894629662220800, which contains 22 as substring.

It is a congruent number.

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, 8605 + ... + 11644.

It is an arithmetic number, because the mean of its divisors is an integer number (1883250).

Almost surely, 2^30778480 is an apocalyptic number.

It is an amenable number.

30778480 is an abundant number, since it is smaller than the sum of its proper divisors (44551520).

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

30778480 is a wasteful number, since it uses less digits than its factorization.

30778480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20281 (or 20275 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 30778480 is about 5547.8356140030. The cubic root of 30778480 is about 313.3880192263.

It can be divided in two parts, 307 and 78480, that added together give a palindrome (78787).

The spelling of 30778480 in words is "thirty million, seven hundred seventy-eight thousand, four hundred eighty".