34521890 has 32 divisors (see below), whose sum is σ = 69234480. Its totient is φ = 12305664.

The previous prime is 34521889. The next prime is 34521899. The reversal of 34521890 is 9812543.

It can be written as a sum of positive squares in 8 ways, for example, as 3508129 + 31013761 = 1873^2 + 5569^2 .

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 (34521899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809 + ... + 8348.

Almost surely, 2^34521890 is an apocalyptic number.

34521890 is an abundant number, since it is smaller than the sum of its proper divisors (34712590).

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

34521890 is a wasteful number, since it uses less digits than its factorization.

34521890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 34521890 is about 5875.5331672964. The cubic root of 34521890 is about 325.6103402613.

The spelling of 34521890 in words is "thirty-four million, five hundred twenty-one thousand, eight hundred ninety".