39642470 has 48 divisors (see below), whose sum is σ = 87907680. Its totient is φ = 12789504.

The previous prime is 39642467. The next prime is 39642481. The reversal of 39642470 is 7424693.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39642470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5951 + ... + 10709.

It is an arithmetic number, because the mean of its divisors is an integer number (1831410).

Almost surely, 2^39642470 is an apocalyptic number.

39642470 is an abundant number, since it is smaller than the sum of its proper divisors (48265210).

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

39642470 is a wasteful number, since it uses less digits than its factorization.

39642470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 39642470 is about 6296.2266477629. The cubic root of 39642470 is about 340.9731921375.

The spelling of 39642470 in words is "thirty-nine million, six hundred forty-two thousand, four hundred seventy".