39542890 has 16 divisors (see below), whose sum is σ = 71578080. Its totient is φ = 15728080.

The previous prime is 39542879. The next prime is 39542891. The reversal of 39542890 is 9824593.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39542891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9256 + ... + 12835.

It is an arithmetic number, because the mean of its divisors is an integer number (4473630).

Almost surely, 2^39542890 is an apocalyptic number.

39542890 is a deficient number, since it is larger than the sum of its proper divisors (32035190).

39542890 is a wasteful number, since it uses less digits than its factorization.

39542890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22277.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 39542890 is about 6288.3137644364. The cubic root of 39542890 is about 340.6874499307.

The spelling of 39542890 in words is "thirty-nine million, five hundred forty-two thousand, eight hundred ninety".