34781890 has 48 divisors (see below), whose sum is σ = 73996416. Its totient is φ = 11668800.

The previous prime is 34781869. The next prime is 34781891. The reversal of 34781890 is 9818743.

34781890 = T₁₃₁₆ + T₁₃₁₇ + ... + T₁₃₅₄.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (34781891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17655 + ... + 19525.

It is an arithmetic number, because the mean of its divisors is an integer number (1541592).

Almost surely, 2^34781890 is an apocalyptic number.

34781890 is an abundant number, since it is smaller than the sum of its proper divisors (39214526).

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

34781890 is a wasteful number, since it uses less digits than its factorization.

34781890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 34781890 is about 5897.6173154928. The cubic root of 34781890 is about 326.4257363185.

The spelling of 34781890 in words is "thirty-four million, seven hundred eighty-one thousand, eight hundred ninety".