30780090 has 48 divisors (see below), whose sum is σ = 87306336. Its totient is φ = 7461600.

The previous prime is 30780077. The next prime is 30780091. The reversal of 30780090 is 9008703.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30780091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14556 + ... + 16535.

It is an arithmetic number, because the mean of its divisors is an integer number (1818882).

Almost surely, 2^30780090 is an apocalyptic number.

30780090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30780090 is an abundant number, since it is smaller than the sum of its proper divisors (56526246).

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

30780090 is a wasteful number, since it uses less digits than its factorization.

30780090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31115 (or 31112 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 30780090 is about 5547.9807137372. The cubic root of 30780090 is about 313.3934834978.

Adding to 30780090 its reverse (9008703), we get a palindrome (39788793).

The spelling of 30780090 in words is "thirty million, seven hundred eighty thousand, ninety".