34391840 has 48 divisors (see below), whose sum is σ = 92860992. Its totient is φ = 11791104.

The previous prime is 34391839. The next prime is 34391857. The reversal of 34391840 is 4819343.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 34391797 and 34391806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14234 + ... + 16473.

It is an arithmetic number, because the mean of its divisors is an integer number (1934604).

Almost surely, 2^34391840 is an apocalyptic number.

It is an amenable number.

34391840 is an abundant number, since it is smaller than the sum of its proper divisors (58469152).

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

34391840 is a wasteful number, since it uses less digits than its factorization.

34391840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30729 (or 30721 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 34391840 is about 5864.4556439622. The cubic root of 34391840 is about 325.2009487054.

The spelling of 34391840 in words is "thirty-four million, three hundred ninety-one thousand, eight hundred forty".