30870390 has 16 divisors (see below), whose sum is σ = 74089008. Its totient is φ = 8232096.

The previous prime is 30870377. The next prime is 30870391. The reversal of 30870390 is 9307803.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1029013 = 30870390 / (3 + 0 + 8 + 7 + 0 + 3 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30870391) 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, 514477 + ... + 514536.

It is an arithmetic number, because the mean of its divisors is an integer number (4630563).

Almost surely, 2^30870390 is an apocalyptic number.

30870390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30870390 is an abundant number, since it is smaller than the sum of its proper divisors (43218618).

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

30870390 is a wasteful number, since it uses less digits than its factorization.

30870390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029023.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30870390 is about 5556.1128498259. The cubic root of 30870390 is about 313.6996533025.

The spelling of 30870390 in words is "thirty million, eight hundred seventy thousand, three hundred ninety".