34720140 has 96 divisors (see below), whose sum is σ = 119669760. Its totient is φ = 7324416.

The previous prime is 34720139. The next prime is 34720159. The reversal of 34720140 is 4102743.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2281 + ... + 8639.

It is an arithmetic number, because the mean of its divisors is an integer number (1246560).

Almost surely, 2^34720140 is an apocalyptic number.

34720140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 34720140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59834880).

34720140 is an abundant number, since it is smaller than the sum of its proper divisors (84949620).

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

34720140 is a wasteful number, since it uses less digits than its factorization.

34720140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6391 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 34720140 is about 5892.3798248246. The cubic root of 34720140 is about 326.2324486675.

Adding to 34720140 its reverse (4102743), we get a palindrome (38822883).

The spelling of 34720140 in words is "thirty-four million, seven hundred twenty thousand, one hundred forty".