39870890 has 16 divisors (see below), whose sum is σ = 73437408. Its totient is φ = 15577296.

The previous prime is 39870889. The next prime is 39870917. The reversal of 39870890 is 9807893.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45932 + ... + 46791.

It is an arithmetic number, because the mean of its divisors is an integer number (4589838).

Almost surely, 2^39870890 is an apocalyptic number.

39870890 is a deficient number, since it is larger than the sum of its proper divisors (33566518).

39870890 is a wasteful number, since it uses less digits than its factorization.

39870890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92773.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 39870890 is about 6314.3400288550. The cubic root of 39870890 is about 341.6268344073.

The spelling of 39870890 in words is "thirty-nine million, eight hundred seventy thousand, eight hundred ninety".