39438240 has 48 divisors (see below), whose sum is σ = 124231968. Its totient is φ = 10516736.

The previous prime is 39438239. The next prime is 39438241. The reversal of 39438240 is 4283493.

It is an interprime number because it is at equal distance from previous prime (39438239) and next prime (39438241).

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (39438241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40602 + ... + 41561.

It is an arithmetic number, because the mean of its divisors is an integer number (2588166).

Almost surely, 2^39438240 is an apocalyptic number.

39438240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39438240 is an abundant number, since it is smaller than the sum of its proper divisors (84793728).

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

39438240 is a wasteful number, since it uses less digits than its factorization.

39438240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82181 (or 82173 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 39438240 is about 6279.9872611336. The cubic root of 39438240 is about 340.3866420424.

The spelling of 39438240 in words is "thirty-nine million, four hundred thirty-eight thousand, two hundred forty".