39920422 has 4 divisors (see below), whose sum is σ = 59880636. Its totient is φ = 19960210.

The previous prime is 39920411. The next prime is 39920423. The reversal of 39920422 is 22402993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22402993 = 29 ⋅772517.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9980104 + ... + 9980107.

It is an arithmetic number, because the mean of its divisors is an integer number (14970159).

Almost surely, 2^39920422 is an apocalyptic number.

39920422 is a deficient number, since it is larger than the sum of its proper divisors (19960214).

39920422 is a wasteful number, since it uses less digits than its factorization.

39920422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19960213.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 39920422 is about 6318.2609949257. The cubic root of 39920422 is about 341.7682446606.

The spelling of 39920422 in words is "thirty-nine million, nine hundred twenty thousand, four hundred twenty-two".