39801890 has 32 divisors (see below), whose sum is σ = 73923840. Its totient is φ = 15422400.

The previous prime is 39801871. The next prime is 39801907. The reversal of 39801890 is 9810893.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42851 + ... + 43769.

It is an arithmetic number, because the mean of its divisors is an integer number (2310120).

Almost surely, 2^39801890 is an apocalyptic number.

39801890 is a deficient number, since it is larger than the sum of its proper divisors (34121950).

39801890 is a wasteful number, since it uses less digits than its factorization.

39801890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 39801890 is about 6308.8739090269. The cubic root of 39801890 is about 341.4296490874.

The spelling of 39801890 in words is "thirty-nine million, eight hundred one thousand, eight hundred ninety".