39495640 has 16 divisors (see below), whose sum is σ = 88865280. Its totient is φ = 15798240.

The previous prime is 39495637. The next prime is 39495649. The reversal of 39495640 is 4659493.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 987391 = 39495640 / (3 + 9 + 4 + 9 + 5 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 39495593 and 39495602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39495649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493656 + ... + 493735.

It is an arithmetic number, because the mean of its divisors is an integer number (5554080).

Almost surely, 2^39495640 is an apocalyptic number.

It is an amenable number.

39495640 is an abundant number, since it is smaller than the sum of its proper divisors (49369640).

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

39495640 is a wasteful number, since it uses less digits than its factorization.

39495640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987402 (or 987398 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 39495640 is about 6284.5556724402. Note that the first 3 decimals coincide. The cubic root of 39495640 is about 340.5516994589.

The spelling of 39495640 in words is "thirty-nine million, four hundred ninety-five thousand, six hundred forty".