30497778 has 24 divisors (see below), whose sum is σ = 66323088. Its totient is φ = 10128312.

The previous prime is 30497759. The next prime is 30497801. The reversal of 30497778 is 87779403.

It is a super-2 number, since 2×30497778² = 1860228925874568, which contains 22 as substring.

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, 2101 + ... + 8087.

It is an arithmetic number, because the mean of its divisors is an integer number (2763462).

Almost surely, 2^30497778 is an apocalyptic number.

30497778 is an abundant number, since it is smaller than the sum of its proper divisors (35825310).

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

30497778 is a wasteful number, since it uses less digits than its factorization.

30497778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6278 (or 6275 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 30497778 is about 5522.4793345019. The cubic root of 30497778 is about 312.4324009516.

The spelling of 30497778 in words is "thirty million, four hundred ninety-seven thousand, seven hundred seventy-eight".