39739390 has 16 divisors (see below), whose sum is σ = 72336240. Its totient is φ = 15716800.

The previous prime is 39739363. The next prime is 39739409. The reversal of 39739390 is 9393793.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21436 + ... + 23215.

It is an arithmetic number, because the mean of its divisors is an integer number (4521015).

Almost surely, 2^39739390 is an apocalyptic number.

39739390 is a deficient number, since it is larger than the sum of its proper divisors (32596850).

39739390 is a wasteful number, since it uses less digits than its factorization.

39739390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44747.

The product of its (nonzero) digits is 137781, while the sum is 43.

The square root of 39739390 is about 6303.9186225712. The cubic root of 39739390 is about 341.2508423993.

The spelling of 39739390 in words is "thirty-nine million, seven hundred thirty-nine thousand, three hundred ninety".