34021440 has 84 divisors (see below), whose sum is σ = 117029484. Its totient is φ = 9071616.

The previous prime is 34021409. The next prime is 34021447. The reversal of 34021440 is 4412043.

It can be written as a sum of positive squares in 2 ways, for example, as 12787776 + 21233664 = 3576^2 + 4608^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (34021447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3027 + ... + 8786.

Almost surely, 2^34021440 is an apocalyptic number.

34021440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

34021440 is an abundant number, since it is smaller than the sum of its proper divisors (83008044).

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

34021440 is a wasteful number, since it uses less digits than its factorization.

34021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11836 (or 11823 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 34021440 is about 5832.7900699408. The cubic root of 34021440 is about 324.0292611890.

Adding to 34021440 its reverse (4412043), we get a palindrome (38433483).

The spelling of 34021440 in words is "thirty-four million, twenty-one thousand, four hundred forty".