39857340 has 24 divisors (see below), whose sum is σ = 111600720. Its totient is φ = 10628608.

The previous prime is 39857291. The next prime is 39857369. The reversal of 39857340 is 4375893.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 332085 + ... + 332204.

It is an arithmetic number, because the mean of its divisors is an integer number (4650030).

Almost surely, 2^39857340 is an apocalyptic number.

39857340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39857340 is an abundant number, since it is smaller than the sum of its proper divisors (71743380).

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

39857340 is a wasteful number, since it uses less digits than its factorization.

39857340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664301 (or 664299 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 39857340 is about 6313.2669831079. The cubic root of 39857340 is about 341.5881297442.

It can be divided in two parts, 3985 and 7340, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 39857340 in words is "thirty-nine million, eight hundred fifty-seven thousand, three hundred forty".